The U.S. military has nearly infinite resources, so when they are stumped, it really means something. These are some of the biggest military unsolved mysteries of all time.

Add Yahoo as a preferred source to see more of our stories on Google. When I walk into my laboratory on weekday mornings, it is not unusual to hear uncontrollable shrieks of glee or fits of giggles.

A look at how bats avoid bumping into each other at night; why a bottlenose dolphin seeks out the help of a scuba diver; are cicadas expert mathematicians.

Discover everything about 25 Science Theories That Are So Strange They Must Be True. Comprehensive guide with facts, insights ...

When I walk into my laboratory on weekday mornings, it is not unusual to hear uncontrollable shrieks of glee or fits of giggles. Laughter is not traditionally thought of as the noise of neuroscience, ...