“The most likely explanation is that it’s an impact crater”
Well, duh! These piled higher and dryer scientists need to engage that thing between their ears. What else would the “crater” be?
Maybe NASA should take a Trip to the Grand Canyon
Uh....a volcanic crater. Not to be rude but, you might want to take your own advice.
Too easy, it’s an exclamation mark.....look for something to the left....or if was done by a Jew to the right.