Planetary Science
An ancient moonpocalypse may explain Neptune’s odd moon Nereid
Neptune’s oddball moon Nereid may be the sole remnant of an earlier system, formed near the planet rather than being pulled in from afar.
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Crabs’ sideways walk may have evolved just once
A study of 50 crab species in Japan traces the iconic sideways walk to a single ancestor, suggesting the trait drove the group's remarkable diversity.
