Viewed from orbit, Jackass Flats — situated in southern Nevada about 65 miles northwest of Las Vegas — could easily be confused for Mars. The alluvial basin is full of tan and gray regolith, hued ...

"It's going to look different because it didn't come from our solar system and that's what makes it so magical." When you purchase through links on our site, we may earn an affiliate commission.

A comet tearing through the inner solar system at roughly 58 kilometers per second formed between 10 and 12 billion years ago, according to isotopic measurements published this year. That would make ...

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