Humans can hear from 20 hertz up to 20,000 hertz, whereas bats hear only in the kilohertz range, from 9 to 200 kilohertz. The grapheme loudspeakers and microphones operate from well below 20 hertz ...

Social media is going batty for a “human-sized” bat. Twitter user @AlexJoestar622 posted a photo that seemingly showed an extremely large, black-winged mammal just hanging out. The snap was ...