The human back is a design disaster
- 1,604,137 Views
- 1,645 Questions Answered
- Best of Web
You know that little pink thing nestled in the corner of your eye? It’s actually the remnant of a third eyelid. In humans, it’s vestigial, meaning it no longer serves its original purpose. There are several other vestigial structures in the human body, quietly riding along from one of our ancestor species to the next. But why have they stuck around for so long?
In the past 3,000 years, many populations have evolved genetic adaptations to their local environments. People in Siberia and the high arctic are uniquely adapted to survive extreme cold. The Bajau people can dive 70 meters and stay underwater for almost 15 minutes. So what are other recent changes? And will our technological innovations impact our evolution?
Create and share a new lesson based on this one.
More from Getting Under Our Skin
Why mosquitoes bite some people more than others
Lesson duration 12:10
What's missing in medical research?
Lesson duration 05:34
Why do we have crooked teeth when our ancestors didn’t?
Lesson duration 05:17
What is a poop transplant, and how does it work?
Lesson duration 05:35