Why animals and other creatures and bacteria of the world are a lot smarter than you might think.
Human children often take care of toys like babies, and it seems chimps do too.
Scientists have recently found 200,000 species of tiny animals, bacteria and fungi that live in our homes.
What can we learn from how chimps behave?
Meet the Giant Pacific Octopus, perhaps the smartest of all invertebrates and the bane of many a crab fisherman.
These flying insects can see fast-moving objects that humans would completely miss.
They can sense low-frequency rumbles that allow them to pick up when a storm is coming.