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Denver-based Boom Technology's XB-1 demonstrator plane hit Mach 1.122 — 750 mph. It's the first independently developed supersonic jet. The company is also working on a supersonic passenger airliner.

While NASA was trying to put a man on the moon, the Navy was quietly conducting a series of tests to see if humans could live and work on the deep seafloor.

Madison Keys was a tennis prodigy, beating Serena Williams when she was just 14 years old, but had not won a grand slam title in her 15 year career.

The executive order speaks of transgender identity in sweeping and dismissive terms and sets the stage for a policy that is more restrictive and punitive than the ban from Trump's first term.

Neymar struggled through physical injuries for most of his time in the Middle East, with a previous ACL rupture that kept him sidelined for a year.