"It's been such a puzzle that there was liquid water on Mars, because Mars is further from the sun, and also, the sun was ...

This is the last chance to catch the pair in conjunction this year—with Venus set to be unusually bright in the night sky.

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

Ancient Greeks saw Olympus as a divine realm of Zeus and the gods, not a mountain. Its link to Mount Olympus emerged in later traditions.

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