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This Week in Science: Mars Molecules, a Cholesterol-Cutting Compound, And More!

This week in science: Mysterious molecules on Mars are tricky to explain without life; a compound that cuts cholesterol as a daily oral pill; an experimental new treatment for sleep apnea has a 93 percent success rate; and much more! Memory Loss in Alzheimer's Linked to Problems With The Brain's 'Replay Mode' [caption id="attachment_192111" align="alignnone" width="642"] (Sean Gladwell/Getty Images/vasabii/Canva)[/caption] Alzheimer's disease interferes with the brain's 'replay mode', contributing to memory loss, according to a new study in mice.

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