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NASA created a haunting audio clip of sound waves rippling out of a supermassive black hole, located 250 million light-years away. The black hole is at the center of the Perseus cluster of galaxies, ...

High above a barren California desert on Tuesday, a privately developed aircraft broke the sound barrier for the first time when Boom Supersonic's XB-1 demonstrator reached Mach 1.122. Piloted by ...

This is a Short History Of The Australian Gold Rush. Written by Nicole Edmunds. With thanks to Mikhala Harkins-Foster, a curator for the National Museum of Australia.