7. The law of sines.
Kids in trig class were thanking Muslim mathematicians when they discovered the law of sines around the year 1000 C.E.
- Physicists have found gravitational waves: wrinkles in space-time that could open up a new way to see the universe
- NATO is sending boats to the Aegean Sea to try to help combat the migrant and refugee crisis.
- Time for Democratic presidential debate number six: Hillary Clinton and Bernie Sanders will face each other in Wisconsin tonight 🇺🇸