Tracking mammals evolution story from sea to land, surviving mass extinctions, flourishing then some going back to the sea again. Plus we find out about clever birds using tools, and creatures with over 25 million years of farming experience.
Another pair of black holes collide and give us more info on gravitational waves. We find out about an asteroid that's stalking the earth in a stable orbit. Plus how long would it take to hear from alien signals from across the galaxy?
15 years on did we hit our Kyoto Protocol goals? Are we now more likely to have bigger floods, and where? Plus new ways to reduce C02 emissions using volcanic rock!
Do animals develop cultures that change across the world? Do animals with different personalities have different genes? We find out about some unusual genetic diversity in animals.