What could you possibly be afraid of? Credit: Oliver Degabriele / Flickr Creative Commons
Three things to know:
According to security expert Juliette Kayyem, terrorism isn’t one of them.
Science writer Annalee Newitz tells us what we can learn from our planet’s turbulent history - and why the mass extinction we’re likely living through now is going to change everything for humans.
Conservationist Cary Fowler says this is something you should care about, if you consider eating crucial to your health.