Bats have colonised remote corners of the planet to become one of most widespread mammals on earth. Chris Packham explores their incredible anatomy, physiology and senses to understand what enables them to thrive in some surprising places. Tiny hairs on their wings give them a detailed air-flow map during flight, heat sensors on the nose of vampire bats means they can sense the most blood-rich areas of a prey's body and iron oxide particles in the bat brain may act as a compass allowing them t