Dot.” “Dash.” Short pulse, long pulse. Humans invented Morse code as a way to communicate using electrical signals. Now, bees ...

Some “clicks” made by sperm whales may actually be “clacks,” but marine biologists debate what, if anything, that means.

Imagine you're watching a movie, in which a character puts a chocolate bar in a box, closes the box and leaves the room. Another person, also in the room, moves the bar from a box to a desk drawer.