SoT 268: The Deadiest Ones
Channel: Science on Top
Date: 2017-06-28

SoT 268: The Deadiest Ones
http://scienceontop.com/268

An archaeological site in a Moroccan cave has long been known to have specimens of early humans. But an recent study has dated some of these bones to over 300,000 years old. If correct, that would make them the oldest fossilised remains of modern humans ever found - and it would change our understanding of the spread of humans out of Africa. For books to help explain evolution to young children, we recommend Grandmother Fish by Jonathan Tweet and Evolution: How We and All Living Things Came To Be by Daniel Loxton.
In the latest send-animals-to-space experiment, flatworms were studied on the International Space Station. And things got weird - especially with one worm that grew two heads!
Recently a lot of scientists have been suggesting that we're currently in the midst of a sixth mass extinction - and we humans are the prime cause of it. But Smithsonian paleontologist Doug Erwin argues that we're not there yet. Things are bad but to call it a mass extinction isn't really accurate. 
And are humans hard-wired to look at faces? A study shines a light on what babies see in the womb.

This episode contains traces of John Oliver talking about vaccines on Last Week Tonight.

http://scienceontop.com/268

Chapters:
00:00:40 300,000 year-old early Homo sapiens sparks debate over evolution https://arstechnica.com/science/2017/06/300000-year-old-early-homo-sapiens-sparks-debate-over-evolution/
00:10:34 When flatworms go to space, they grow two heads https://arstechnica.com/science/2017/06/when-flatworms-go-to-space-they-grow-two-heads/
00:15:42 Earth Is Not in the Midst of a Sixth Mass Extinction https://www.theatlantic.com/science/archive/2017/06/the-ends-of-the-world/529545/
00:19:42 Fetuses Prefer Face-Like Images Even in the Womb https://www.theatlantic.com/science/archive/2017/06/scientists-show-images-to-babies-in-the-womb/529566/