What will humans be like in 10,000 years?
This suggests some surprising things about our future. We will likely live longer and become taller, as well as more lightly built. We'll probably be less aggressive and more agreeable, but have smaller brains. A bit like a golden retriever, we'll be friendly and jolly, but maybe not that interesting.
Humans looked essentially the same as they do today 10,000 years ago, with minor differences in height and build due to differences in diet and lifestyle. But in the next 10 millennia, we may well have refined genetic 'editing' techniques to allow our children to all be born beautiful and healthy.
Perhaps we will have longer arms and legs. In a colder, Ice-Age type climate, could we even become even chubbier, with insulating body hair, like our Neanderthal relatives?
(It also considered scenarios in between.) In 10,000 years, if we totally let it rip, the planet could ultimately be an astonishing 7 degrees Celsius warmer on average and feature seas 52 meters (170 feet) higher than they are now, the paper suggests.
Humans in the year 3000 will have a larger skull but, at the same time, a very small brain. "It's possible that we will develop thicker skulls, but if a scientific theory is to be believed, technology can also change the size of our brains," they write.
Virtually impossible. To even begin to evolve in that direction, our species would need to be subject to some sort of selective pressure that would favour the development of proto-wings, which we're not.
Four billion years from now, the increase in Earth's surface temperature will cause a runaway greenhouse effect, creating conditions more extreme than present-day Venus and heating Earth's surface enough to melt it. By that point, all life on Earth will be extinct.
Asteroid strikes, supernovae blasts, and other calamities could take out humanity. But no matter what, a cataclysmic event 1 billion years from now will likely rob the planet of oxygen, wiping out life.
We will likely live longer and become taller, as well as more lightly built. We'll probably be less aggressive and more agreeable, but have smaller brains. A bit like a golden retriever, we'll be friendly and jolly, but maybe not that interesting.
The further apart two animals are in genetic terms, the less likely they are to produce viable offspring. At this point, humans seem to have been separate from other animals for far too long to interbreed. We diverged from our closest extant relative, the chimpanzee, as many as 7 million years ago.
What will Earth be like in 50,000 years?
Many scientists think that the next ice age will reach its peak in about 80,000 years [source: Revkin]. So, in 50,000 years, the planet will likely be a much colder place, with ice sheets approaching areas as far south as New York City. What about global warming? We'll get to that next.
Physicist Stephen Hawking has warned humanity that we probably only have about 1,000 years left on Earth, and the only thing that could save us from certain extinction is setting up colonies elsewhere in the Solar System.
In 100 years, the world's population will probably be around 10 – 12 billion people, the rainforests will be largely cleared and the world would not be or look peaceful. We would have a shortage of resources such as water, food and habitation which would lead to conflicts and wars.
“I actually did some calculations years ago and found that if we could cure human aging, average human life span would be more than 1,000 years,” he tells Scientific American. “Maximum life span, barring accidents and violent death, could be as long as 20,000 years.”
Ancient humans looked a lot like us. That is, if you were to meet Homo erectus, Homo naledi, Homo neanderthalensis or any of the many species and lineages of archaic hominin you would recognize them immediately as your evolutionary cousin.
While some researchers contend that a natural limit sits around 120, 140, or 150 years, others speculate that a limit doesn't exist—and that aging doesn't necessarily lead to death.
Evolving to live underwater would be de-evolution. It means species are reverting to supposedly more primitive forms. We, as humans, have evolved from living underwater(fish or aquatic species) to living on land. This took more than 350 million years.
But then, roughly 25 million years ago, the tails disappeared. Charles Darwin first recognized this change in our ancient anatomy. But how and why it happened has remained a mystery. Now a team of scientists in New York say they have pinpointed the genetic mutation that may have erased our tails.
If you drank seawater, the salt would get absorbed into your blood along with the water . That would make your blood too salty. So, your kidneys would have to remove the salt. But to do that they would need to use even more water!
Average human life expectancy will likely keep increasing for the foreseeable future for at least four reasons: Advances in medical science, e.g. curing neurodegenerative diseases. Better understanding of the ageing process, leading to the ability to slow or maybe even a halt natural ageing.
What would happen if humans went extinct?
The dams and levees that people have built on the rivers and streams of the world would erode. Farms would fall back to nature. The plants we eat would begin to disappear. Not much corn or potatoes or tomatoes anymore.
The total land surface area of Earth is about 57,308,738 square miles, of which about 33% is desert and about 24% is mountainous. Subtracting this uninhabitable 57% (32,665,981 mi2) from the total land area leaves 24,642,757 square miles or 15.77 billion acres (43%) of habitable land.
Nuclear war is an often-predicted cause of the extinction of mankind. Some of the many possible contributors to anthropogenic hazard are climate change, global nuclear annihilation, biological warfare, weapons of mass destruction, and ecological collapse.
It is now clear that early Homo sapiens, or modern humans, did not come after the Neandertals but were their contemporaries. people. They were very similar in appearance to modern Europeans. Males were 5 feet 4 inches to 6 feet tall (1.6-1.8 m.)
Five billion years from now, it's said the Sun will have grown into a red giant star, more than a hundred times larger than its current size. Eventually, it will eject gas and dust to create an 'envelope' accounting for as much as half its mass. The core will become a tiny white dwarf star.