Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. G'day, Dr Karl here. Now most of us know that some bats find their way around using sound. This is ...

This is the fifth and final instalment of our “five amazing physics demonstrations” presented by science-demo guru Neil Downie and his adept assistant Matthew Isbell. In a special feature in the April ...

G'day, Dr Karl here. Now most of us know that some bats find their way around using sound. This is called echolocation, and we've known about it since the 1930s. But just recently we discovered that ...