Democratic debate: Biden defends son on Ukraine questions

Joe Biden defended his son against President Donald Trump's criticism at Tuesday night's Democratic presidential debate, contending Trump is going after the son because he fears facing the former vice president who would "beat him like a drum."

Planet-hunting NASA satellite captures a star being ripped apart by a black hole

For the first time, NASA’s planet-hunting Transiting Exoplanet Survey Satellite (TESS) was able to watch the “cataclysmic phenomenon” of a star being torn apart by a black hole from beginning to end. Using follow-up observations from telescopes, astronomers were able to capture unprecedented data about the star-destroying events known as tidal disruptions.