Asteroids could have delivered water to the early Earth | Science News
https://www.sciencenews.org/article/asteroids-could-have-delivered-water-early-earth
2:00pm, April 25, 2018 ... SPLISH SPLASH This video
of a hypervelocity impact experiment shows an antigorite pellet hitting
a tray full of dried pumice at about 5 kilometers per second — a speed
similar to those at which asteroids probably crashed into the ...
Published online April 25, 2018. doi:10.1126/sciadv.aar2632.