Why I built my own time machine | Lucas Rizzotto

"The free, online, mainstream pornography that teenagers are most likely to see is a completely terrible form of sex education," says public health researcher Emily F. Rothman. She shares how her miss...

4 Sep 201915min

In spring 2019, more than 17,000 Europeans from 33 countries signed up to have a political argument with a complete stranger. They were part of "Europe Talks," a project that organizes one-on-one conv...

3 Sep 201912min

There’s two times more carbon in the earth's soil than in all of its vegetation and the atmosphere -- combined. Biogeochemist Asmeret Asefaw Berhe dives into the science of soil and shares how we coul...

3 Sep 201913min

As we recklessly warm the planet by pumping greenhouse gases into the atmosphere, some industrial emissions also produce particles that reflect sunshine back into space, putting a check on global warm...

1 Sep 201913min

"North Korea is unimaginable," says human rights activist Yeonmi Park, who escaped the country at the age of 10. Sharing the harrowing story of her childhood, she reflects on the fragility of freedom ...

30 Aug 201910min

TV news anchor Lee Thomas thought his career was over after he was diagnosed with vitiligo, an autoimmune disorder that left large patches of his skin without pigment and led to derision and stares. I...

29 Aug 201913min

Can technology make people safer from threats like violent extremism, censorship and persecution? In this illuminating talk, technologist Yasmin Green details programs pioneered at Jigsaw (a unit with...

28 Aug 201913min

"For all that's ever been said about climate change, we haven't heard nearly enough about the psychological impacts of living in a warming world," says science writer Britt Wray. In this quick talk, s...

27 Aug 20197min