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Earth

Watching this newborn island erode could tell us a lot about Mars

The birth and death of a young volcanic island in the Pacific Ocean may shed light on the origins of volcanoes in Mars’ wetter past.

Planetary Science

Saturn’s rings mess with the gas giant’s atmosphere

Data from Cassini’s shallow dives into Saturn’s ionosphere show that this charged layer in the atmosphere interacts with the planet’s rings.

Animals

Once settled, immigrants play important guard roles in mongoose packs

Dwarf mongoose packs ultimately benefit from taking in immigrants, but there’s an assimilation period.

Animals

This ancient marsupial lion had an early version of ‘bolt-cutter’ teeth

Extinct dog-sized predator crunched with unusual slicers toward the back of its jaw.