In this week’s issue, a new theory on how Homo sapiens conquered the planet. Plus: black lava from a bizarre volcano could reveal Earth’s deep secrets.

Grab a copy from newsstands or get our app to download digital and audio editions.https://t.co/S71n8nT73a pic.twitter.com/H2Iaj63amt

— New Scientist (@newscientist) November 25, 2021