Moon might harbor bits blasted off Earth billions of years ago. These lunar time capsules could hold secrets of what Earth was like as life first emerged.
Warming temps, and the rise and fall of coasts, complicate measurements of sea level. How do scientists establish sea level on a constantly changing Earth?
What does this year's odd U.S. weather have in common with a huge spike in hungry, stranded sea lion pups on California shores? Both are linked to a giant patch of warm ocean water.
Members of the EarthSky community - including scientists, as well as science and nature writers from across the globe - weigh in on what's important to them.
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