After 29 years from now we will sore new heights in technology and medical science. Try not to get befuddled on the off chance that you see robots and distinctive A.I machines at your work place. Possibly we could go to Mars and different planets. 4G and 5G will turn out to be exceptionally normal and think about what perhaps it would not be being used around then.
Yet, not to fail to remember that now our mother earth is confronting such a lot of a global warming, contamination, deforestation, ozone layer depletion and the list goes on. A few specialists accept that a large number of the cities or nation will get vanished in next 10 to 20 years. These generally incorporates cities close to seaside area on the grounds that the degree of ocean water is rising step by step. Because of global warming polar caps are melting and colder areas are becoming hotter.
We may likewise confront water shortage in 2050 in light of the fact that fresh water is just 2.5% on earth and we are not conserving our natural resources. Not notice that oxygen that we inhale will likewise be exceptionally less in 2050 in light of the fact that now additionally because of contamination air we inhale is becoming poisonous step by step which can influence our lungs gravely. The measure of harmful gases like Sulfur dioxide, nitrogen dioxide and carbon monoxide are influencing air quality index(AQI) gravely. A few specialists say that we may have to convey our own oxygen cylinder in 2050.
Regardless of the amount we dominate in our innovation however we will require these regular assets to live healthy. What will be the reason behind living in such developed society in the event that we can’t be healthy. So we need to save our natural resources and limit contamination assuming we need to live heathy in 2050.
Mоre thаn 5,000 kilоmeters beneаth us, Eаrth’s sоlid metаl inner соre wаsn’t disсоvered until 1936. Аlmоst а сentury lаter, we’re still struggling tо аnswer bаsiс questiоns аbоut when аnd hоw it first fоrmed. These аren’t eаsy рuzzles tо sоlve. We саn’t direсtly sаmрle the inner соre, sо the key tо unrаveling its mysteries lies in соllаbоrаtiоn between seismоlоgists, whо indireсtly sаmрle it with seismiс wаves, geоdynаmiсs, whо сreаte mоdels оf its dynаmiсs, аnd minerаl рhysiсists, whо study the behаviоr оf irоn аllоys аt high рressures аnd temрerаtures. Соmbining these disсiрlines, sсientists hаve delivered аn imроrtаnt сlue аbоut whаt’s hаррening miles beneаth оur feet. In а new study, they reveаl hоw Eаrth’s inner соre is grоwing fаster оn оne side thаn the оther, whiсh соuld helр exрlаin hоw оld the inner соre is, аnd the intriguing histоry оf Eаrth’s mаgnetiс field. Eаrly Eаrth’s соre wаs fоrmed very eаrly in оur рlаnet’s 4.5 billiоn-yeаr histоry, within the first 200 milliоn yeаrs. Grаvity рulled the heаvier irоn tо the сenter оf the yоung рlаnet, leаving the rосky, siliсаte minerаls tо mаke uр the mаntle аnd сrust.
Eаrth’s fоrmаtiоn сарtured а lоt оf heаt within the рlаnet. The lоss оf this heаt, аnd heаting by оngоing rаdiоасtive deсаy, hаve sinсe driven оur рlаnet’s evоlutiоn. Heаt lоss in Eаrth’s interiоr drives the vigоrоus flоw in the liquid irоn оuter соre, whiсh сreаtes Eаrth’s mаgnetiс field. Meаnwhile, сооling within Eаrth’s deeр interiоr helрs роwer рlаte teсtоniсs, whiсh shарes the surfасe оf оur рlаnet. Аs Eаrth сооled оver time, the temрerаture аt the сenter оf the рlаnet eventuаlly drоррed belоw the melting роint оf irоn аt extreme рressures, аnd the inner соre stаrted tо сrystаllize. Tоdаy, the inner соre соntinues tо grоw аt rоughly 1mm in rаdius eасh yeаr, whiсh equаtes tо the sоlidifiсаtiоn оf 8,000 tоnnes оf mоlten irоn every seсоnd. In billiоns оf yeаrs, this сооling will eventuаlly leаd tо the whоle соre beсоming sоlid, leаving Eаrth withоut its рrоteсtive mаgnetiс field.
I learnt of Climate change and global warming in high school and just revisited it after 7 years.
On the 6th of June 2018, Texas was hit by a hail storm – in the middle of a summer. The Artic has lost more than 50% of its ice. Russia, US, Scandinavian countries and many more are already on their way to claim the resource rich seas. The average temperature of the world is higher than ever. The awe that people had when the skies were clearer during the near global lockdown due to COVID-19 was evident. The amazon rainforests are on fire, yes, they still are. The Canadian and European forests are burning faster and earlier than in recorded history. There have been cases of untimely forest fires in India as well, not to forget that a large part of Australian bush wilderness was lost in 2020. To add to this, a million cubic meters of the Gulf of Mexico is dead, Antarctica is browning, Yemen has lesser water than the already no water situation and many countries have brought green energy into their federal budgets. That’s a lot many things happening together.
When I was still a high school student, we had studied about all the important conventions and their goals with regards to the planet – the Kyoto protocol, the Montreal Protocol and so on. Then came the Paris Accords. To add to it was the information that global temperatures must be limited to a degree and half more than the 1950 level or else the planet will go berserk. I don’t know how old the new news is, but the news is that the scientists concluded that there is no way the goal can be achieved. And now we must try to limit the temperature at four and a half degrees above the previously said level to avoid the loss of agricultural lands across the planet.
That is a huge leap of faith for me and maybe for many more people who do not really invest even very small amounts of time to know the news that the planet has to give. We are too occupied with corruption, civil wars and international blame games. To be frank, I try not to waste water, electricity or even throw plastics or dump trash outside a bin or a designated area. I try to walk or cycle and as of now, just lie around in my room for most of the time. And the trouble is, the environmental problems are too large now. Because one, everyone doesn’t carry out the simple acts of being considerate towards the environment and two, the emissions by the rich and the ones not so rich but busy in producing what we consume are too big and have restrictions full of loop holes on them. The environment norms are yet not very sturdy. Sturdy is not strict, rigid and harsh. Sturdy are the ones that help. For instance, to implement rules eliminating the use of fossil fuels based vehicular fuel eliminates the exhaust the vehicles shall produce. However, in most countries, especially the most populated ones in Asia, South America and Africa still produce their energy using fossil fuels. How are these countries going to charge electric vehicles? Using fossil fuels. That in turn means the use of “dirty” energy is itself not eliminated. There are several more examples like the flawed system of Carbon credits and so on.
What can we do? Be more considerate to the world to reduce domestic output of toxins. And to reduce consumption of goods that are harmful to this planet. And google is a sufficient enough aid for knowing which products do that and which don’t.
A whooping 7.9 billion people, 8.7 million discovered eukaryotic species and an estimated 1 trillion microbes- How did it all came into being? How did our Earth or even better, the solar system or the whole universe came into being?
So, it all began about 13.8 billion years ago. There existed a single point, a minute, hot and really dense point which violently exploded-‘The Big Bang’, and it is how everything came into being- Matter, Energy space, universe, stars, solar system, me, you-everything. After the explosion took place, it expanded into what we today call the universe. And, what’s more interesting is the fact that it is still expanding, and this is how the scientists came to believe that it all began with a big bang.
Scientists divide the period after the big bang into 2 era-
Radiation era
Matter era
Radiation era
The period between 10^(-43) seconds (after the explosion took place)-the Planck era(here, the current laws of physics do not apply), to about 30,000 years after the big bang is referred to as the radiation era. During this period, the temperature of the atmosphere was soo high that there was no distinction between matter and radiation ,or even better, no matter existed.
It is divided into 7 era or epoch-
Grand unification epoch- Named for the unification of 3 grand forces of nature- Electro-magnetic forces, Weak forces, Strong nuclear forces. With a temperature greater than 1029 K, it began 10−43 s after the big bang. At the end of this epoch, the strong nuclear force broke away from the other two.
Inflationary epoch- With a temperature greater than 1032 K, it began 10−36 s after the big bang. As the name suggests, the universe rapidly expanded in this epoch. The universe, ta this time had electrons, quarks and antiquarks.
Electroweak epoch- Here, now all the 4 forces of nature have split off. Temperature- 10^20 K and time after big bang- 10^(-32)s.
Quark epoch- Temperature here is 10^16K and 10^-12 s have passed since the big bang. All of the ingredients required to form subatomic particles were present but the universe still was too hot and dense.
Hadron Epoch- Temperature- 10^10 K and Temperature-10^-6 s. The universe has not finally cooled down enough for subatomic particles to form and hence, quarks bind to form protons and neutrons.
Lepton epoch- Temperature- 10^ 12 K and finally, about1 sec have passed since the big bang.
Nuclear epoch- Temperature-10^9 K and 100 s approximately have passed since the big bang.
In these last two epoch, when the universe has cooled down quite a lot, the protons and neutrons fuse together to form the very first chemical elements- Hydrogen and Helium. And now that our universe is capable of forming elements, it brings us to the end of radiation era and the matter era begins.
Matter Era
Matter era includes 3 epoch that spread over billions of years and include the formation of our galaxy, solar system and even the present day.
Atomic epoch- With the temperature of 3000 K and time after big bang- 50,000 years, this epic marks the beginning of attachment of electrons to nuclei. This process is known as recombination.
Galactic epoch- Now, 200 million years have passed since the formation of our universe. With the ability of universe to now form Hydrogen and Helium molecules, the universe is dotted with atomic clouds. Within the clouds, due to gravity, clusters were formed which later led to the formation of galaxies.
Stellar epoch- 3 billion years have now passed. Within those clusters of clouds, now stars will be formed. Stars begin their lives as proto-stars. These are formed as a result of gravitational forces between particles of dust and gas and heat is generated due to friction and collision. When the proto-star becomes extremely hot, the process of thermonuclear fusion starts taking place. This is how stars generate heat and electricity. This heat within the clouds convert the already exiting elements into all others that are currently known to humankind. When stars burn themselves and are destroyed in explosion know as supernova, it destabilizes the heat cloud, which then begins to rearrange itself in the shape of a flattened disc. At the center a proto-star forms (eg.- our sun). The clumps of dust are flash heated and form chrondules that later from planetesimals by cohesion. These planetesimals then, later accrete to form what we call today as planets.
And this is how our solar system was formed about 4.5 billion years ago. It is located in the Milky Way galaxy’s Orion Star Cluster and has about 8 planets with a total of 63 moons. The inner 4 planets (also known as terrestrial planets) are separated form the outer 4(also known as jovian planets) by a belt of asteroids. Terrestrial planets are known as such because they are made of rocky material, have solid surface, do nor have rings and are relatively small. Earth, among these, is the only one to have a moon.
The jovian planets, on the other hand, have multiple moons, support ring system, have no solid surface and are immense in size. The Oort Cloud, a collection of icy debris, marks the edge of our solar system as the gravitational and physical influence of sun diminishes .
This is how our solar system and our Earth were formed. Now, can our solar system end? If yes, then how and by when? It’s a question for a later time.
Liquid water may still flow on Mars, but that doesn’t mean it’s easy to spot. The search for water on the Red Planet has taken more than 15 years to turn up definitive signs that liquid flows on the surface today. In the past, however, rivers and oceans may have covered the land. Where did all of the liquid water go? Why? How much of it still remains?
Observations of the Red Planet indicate that rivers and oceans may have been prominent features in its early history. Billions of years ago, Mars was a warm and wet world that could have supported microbial life in some regions. But the planet is smaller than Earth, with less gravity and a thinner atmosphere. Over time, as liquid water evaporated, more and more of it escaped into space, allowing less to fall back to the surface of the planet.
Where is the water today?
Liquid water appears to flow from some steep, relatively warm slopes on the Martian surface. Features known as recurring slope lineae (RSL) were first identified in 2011in images taken by the High Resolution Imaging Science Experiment (HiRISE) camera aboard the Mars Reconnaissance Orbiter (MRO). The dark streaks, which appear seasonally, were confirmed to be signs of salty water running on the surface of the planet.
“If this is correct, then RSL on Mars may represent the surface expression of a far more significant ongoing drainage system on steep slopes in the mid-latitudes,” a research team member told Space.com in 2012.
“The detection of hydrated salts on these slopes means that water plays a vital role in the formation of these streaks,” the study’s lead author, Lujendra Ojha, of the Georgia Institute of Technology in Atlanta, said in a statement. Vast deposits of water appear to be trapped within the ice caps at the north and south poles of the planet. Each summer, as temperatures increase, the caps shrink slightly as their contents skip straight from solid to gas form, but in the winter, cooler temperatures cause them to grow to latitudes as low as 45 degrees, or halfway to the equator. The caps are an average of 2 miles (3 kilometers) thick and, if completely melted, could cover the Martian surface with about 18 feet (5.6 meters) of water.
Frozen water also lies beneath the surface. Scientists discovered a slab of ice as large as California and Texas combined in the region between the equator and north pole of the Red Planet. The presence of subsurface water has long been suspected but required the appearance of strange layered craters to confirm. Other regions of the planet may contain frozen water, as well. Some high-latitude regions seem to boast patterned ground-shapes that may have formed as permafrost in the soil freezes and thaws over time.
The European Space Agency’s Mars Express spacecraft captured images of sheets of ice in the cooler, shadowed bottoms of craters, which suggests that liquid water can pool under appropriate conditions. Other craters identified by NASA’s Mars Reconnaissance Orbiter show similar pooling.
Evidence for water on Mars first came to light in 2000, with the appearance of gullies that suggested a liquid origin. Their formation has been hotly debated over the ensuing years.
But not everyone thinks that Mars contains water today. New research reveals that RSL may actually have formed by granular flows formed by the movement of sand and dust.
“We’ve thought of RSL as possible liquid water flows, but the slopes are more like what we expect for dry sand,” lead author Colin Dundas said in a statement. “This new understanding of RLS supports other evidence that shows that Mars today is very dry.”
That idea may have been washed away by the recent discovery of a possible subsurface lake near the Martian South Pole.
An underground lake?
Researchers made a big splash when they announced that Mars might be hiding a lake beneath its southern pole. The European Mars Express spacecraft used its Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) to detect the proposed water. Ground-penetrating radar sent radar pulses to the surface, then timed how long it took for them to be reflected. The properties of the subsurface layers affect how long it takes for the beams to return.
MARSIS’ investigation revealed that the Martian south pole is composed of multiple layers of ice and dust to a depth of about nearly 1 mile (1.5 kilometers) spread over a 124-mile-wide (200 km) region.
“This subsurface anomaly on Mars has radar properties matching water or water-rich sediments,” Roberto Orosei, principal investigator of the MARSIS experiment and lead author of the new research, said in a statement.
MARSIS also revealed the presence of a subsurface lake among the pockets. According to the radar echoes, the lake is no more than 12.5 miles (20 km) across, buried nearly a mile beneath the surface. The scientists aren’t certain of the lake’s depth, but they have confirmed that it is at least 3 feet (1 meter) deep. According to the researchers, the lake must have salt to keep from freezing.
“This is just one small study area; it is an exciting prospect to think there could be more of these underground pockets of water elsewhere, yet to be discovered,” Orosei said.
Not all researchers are as certain about the presence of liquid water.
“I think it’s a very, very persuasive argument, but it’s not a conclusive or definitive argument,” Steve Clifford, a Mars researcher at the Planetary Science Institute in Arizona, told Space.com. “There’s always the possibility that conditions that we haven’t foreseen exist at the base of the cap and are responsible for this bright reflection.”
More than three decades ago, Clifford proposed that Mars could harbor liquid water beneath its polar caps in the same way that Earth does. On Earth, lakes beneath the Antarctic and Greenland ice sheets are created when heat from within the planets melt the glaciers in patches. Clifford told Space.com that a similar scenario could happen beneath the Martian polar ice caps.
“The bright spot seen in the MARSIS data is an unusual feature and extremely intriguing,” Jim Green, NASA’s chief scientist, said in a statement. “It definitely warrants further study. Additional lines of evidence should be pursued to test the interpretation.”
“We hope to use other instruments to study it further in the future,” Green said.
Liquid gold
Water may seem like a very common element to those of us stuck on Earth, but it has great value. In addition to understanding how Mars may have changed and developed over time, scientists hope that finding water will help them to find something even more valuable — life, either past or present.
Only Earth is known to host life, and life on our planet requires water. Though life could conceivably evolve without relying on this precious liquid, scientists can only work with what they know. Thus they hope that locating water on celestial bodies such as Mars will lead to finding evidence for life.
With this in mind, NASA developed a strategy for exploring the Red Planet that takes as its mantra “follow the water.” Recent orbiters, landers, and rovers sent to Mars were designed to search for water, rather than life, in the hopes of finding environments where life could have thrived.
That has changed, however, with the flood of evidence these robots have returned. Curiosity determined that Mars could indeed have supported microbial life in the ancient past, and the next NASA rover — a car-size robot-based heavily on Curiosity’s basic design — will blast off in 2020 to look for evidence of past Red Planet life.
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