Animals
How do bats avoid crashing into trees?
Because bats listen to echoes from their own high squeaks. A bat sends out sounds too high for most humans to hear. The returning echoes tell it where branches, insects and walls are, even in darkness.
Animals
Because bats listen to echoes from their own high squeaks. A bat sends out sounds too high for most humans to hear. The returning echoes tell it where branches, insects and walls are, even in darkness.