Ever wonder how the heart symbol came to stand for the actual heart? And why do we speak of the heart as the seat of love, when love really happens in our brains? Is it true that animals only get a billion heartbeats? This week, we give you enough cool cardiac science to make your heart skip a beat.
Why do we sleep? We spend a third of our lives in slumber, but science has yet to determine exactly why we have do it. Here’s a look at how sleep works, why we’re not getting enough sleep, what happens if you DON’T sleep, and an idea about where sleep came from in the first place.
2015 • Health
Every year, the pipistrelle bat undertakes a mysterious migration. This discreet journey covers thousands of kilometers and triggers puzzles that scientists are still trying to understand today. Thanks to cutting-edge technology, we will track the bats on their journey.
The savannah is home to some of the greatest herds on Earth, and in this episode, Wild Africa brings you close encounters with these animals. The savannah is Africa's youngest landscape, shaped by the weather and the animals themselves as the continent dried. It is now home to baboons, wildebeest, lions, cheetah, and aardvarks who must struggle through the eight-month dry season to survive.