It sometimes feels as if we humans are in a race. The race is between our own burgeoning population numbers, and our political and technological will to solve the problems that come with increasing population.
Listen to anthropologist Jim Moore, on what's so important about a Tanzania study that provides the first evidence that chimps use tools to forage for tubers.
More than 70 percent of all energy in our universe is thought to be dark energy. But - though theoretical models say it should exist - astronomers have yet to detect dark energy. How astronomers are trying to solve one of the greatest scientific mysteries of our time.
Murphy says you could look out the window of the airplane and see the air colored brown as you were flying, even though you're hundreds or thousands of miles from the nearest big city. He talks about the sources of this haze.
Hibernators have an internal clock, a series of chemical reactions controlled by the hypothalamus of the animal's brain. Read more about hibernating animals.
With few predators and plenty of aphids to eat. the Multicolored Asian Lady Beetle has undergone a population explosion. Learn why ladybugs sometimes swarm here.