Bad news. Asteroid 1999 KW4 flew by, did not hit Earth killing us all. Good news: Another one, Didymos, is on the way

Not due to whiz past, 5.9 million km away, until 2123. NASA still wants to crash a DART into it
A pair of asteroids just whizzed past Earth at 70,000 KPH (43,496 MPH), and although the flyby presented no danger to our home world, we can learn from the close encounter to potentially thwart any future menaces from the cosmos.…