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  • Hey there and welcome to Life Noggin.

  • A lot can change over the course of a century.

  • In the early 20th century, Einstein wrote his theory of relativity.

  • In 1953, Dr. Jonas Salk announced that he had successfully created a polio vaccine.

  • And in 1990, the world wide web was invented.

  • But what about changes over a longer period of time, like a few million years?

  • Obviously, the Earth was a drastically different place, but it makes me wonder: could you,

  • a modern human, survive on Earth 2.5 million years ago?

  • To start off, let’s talk about the environment.

  • You, my friend, would be living in the Pleistocene Epoch, which spanned from 2.6 millions years

  • ago to 11,700 years ago.

  • This was the time period in which the most recent ice ages took place.

  • During the peak periods where most of the water on Earth was ice, the global average

  • temperatures were 5 to 10 degrees Celsius colder than they are today.

  • This was a much cooler and drier Earth.

  • So already, unless you have an incredibly insulating jacket, your chances of survival

  • are looking pretty slim.

  • During this time, you may also have bumped into one of your earliest human ancestors

  • -- homo habilis.

  • This species looked more like apes than humans, but were able to walk on their back legs and

  • use their hands to make stone tools, hence its name, which meanshandy man”.

  • But, luckily for you, if you encountered one of them, scientists are unsure if it would

  • attack.

  • The general consensus is that homo habilis were vegetarians and did not hunt anything

  • but small game.

  • So, in this sense, you may not be in direct harm.

  • But what about diseases?

  • The prevailing idea on the origin of human diseases is that many of them arose once animals

  • were domesticated.

  • However, with new data, it’s thought that diseases like tapeworms, mycobacterial infections,

  • tuberculosis, and leprosy were around during the Pleistocene Epoch.

  • And scientists believe that the bacteria B. bronchiseptica, which infected hominids 2.5

  • million years ago, may have evolved into the bacteria that is now responsible for whooping

  • cough.

  • And even more, scientists have recently determined that the parasites that cause malaria were

  • around 2.5 million years ago.

  • The parasites were relatively benign at that time, and malaria only became a major disease

  • after agriculture and dense human populations arose.

  • But if you were living 2.5 million years ago, without access to any of today’s medicine,

  • you would probably not make it too long.

  • Well that’s quite a sad note to end on.

  • To lighten the mood a bit, let me know what you would most want to see from 2.5 million

  • years ago.

  • Make sure you come back every Monday for a brand new video.

  • As always, I’m Blocko and this has been Life Noggin.

  • Don’t forget to keep on thinking!

Hey there and welcome to Life Noggin.

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250万年前に生き残れるか? (Could You Survive 2.5 Million Years Ago?)

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    Amy.Lin に公開 2021 年 01 月 14 日
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