Comparing the moon rocks brought back from the Apollo missions to howardite and eucrite meteorites, researchers have determined that an event known as the lunar cataclysm 4 billion years ago peppered both the moon and a far-off asteroid.
TODAY IN SLATE
Smash and Grab
Will competitive Senate contests in Kansas and South Dakota lead to more late-breaking races in future elections?
Even When They Go to College, the Poor Sometimes Stay Poor
Here’s Just How Far a Southern Woman May Have to Drive to Get an Abortion
The Most Ingenious Teaching Device Ever Invented
Marvel’s Civil War Is a Far-Right Paranoid Fantasy
It’s also a mess. Can the movies do better?
Sprawl, Decadence, and Environmental Ruin in Nevada
An All-Female Mission to Mars
As a NASA guinea pig, I verified that women would be cheaper to launch than men.