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Oceans

A transatlantic flight may turn Saharan dust into a key ocean nutrient

Over time, atmospheric chemical reactions can make iron in dust from the Sahara easier for organisms to take in, helping to create biodiversity hot spots.

Animals

Some tadpoles don’t poop for weeks. That keeps their pools clean

Eiffinger’s tree frog babies store their solid waste in an intestinal pouch, releasing less ammonia into their watery cribs than other frog species.

Astronomy

Barnard’s star has at least one planet orbiting it after all

After decades of searching, a telltale gravitational wobble points to an exoplanet orbiting the nearby red dwarf every 3.15