"(Tape) We became very curious about this because this impact feature, if it was an impact feature, could be fairly recent -- it could be as recent as 5 to 10,000 years before the present."
"(Tape) We became very curious about this because this impact feature, if it was an impact feature, could be fairly recent -- it could be as recent as 5 to 10,000 years before the present."
How could they know the difference? Do they know the difference between meteor and and meteorite or between asteroid and comet? Does NASA give science writing assignments to freshman staff not yet qualified to write for the sports page?