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There's an Insidious Reason Why It Takes So Long to Diagnose Endometriosis

Why Did Vikings Mysteriously Leave Greenland? We May Finally Know The Reason

InSight — the first "geophysicist on Mars" — is in trouble. Dust is covering its solar panels, and power could be lost by Summer. Some have asked why InSight has no mechanism to clean them. “The reason can be summed up in one word: money," says Bruce Barnerdt, principal investigator.