Earth's days once got 2 hours longer — and that may have triggered one of the biggest evolutionary explosions in history, study suggests 

 The moon once drifted thousands of miles farther away, and Earth's days got 2.2 hours longer, a new study finds. 

https://cdn.mos.cms.futurecdn.net/PncSR3kS2vJ2erkbTcM6eU.jpg

https://www.space.com/earth-day-2-hours-longer-evolutionary-explosion