A rock on Mars that may hold clues about ancient microbial life on the Red Planet continues to puzzle scientists.
The intriguing chemistry of a rock collected by the Perseverance rover could trace to microbial activity—or not ...
The rock features spots of black, blue, or greenish hues, which the researchers have nicknamed "poppy seeds." Alongside these are dozens of dark-rimmed, millimeter-size splotches dubbed "leopard ...
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