Sponges are filter feeders with no sophisticated digestive system, a consumption method that absorbs less oxygen—and may have made the squishy creatures central to early life on Earth.
Procedural Purgatory It’s time to stop asking when Loretta Lynch will be confirmed and start wondering if she ever will be.
Biggest Sellout Now that Guinness World Records is in bed with publicity-seeking companies, can we trust it?
What Happened at Slate This Week? Alison Griswold describes her experience reporting on the Germanwings tragedy.
Is This Thing On? The fierce debate over whether we should try to contact extraterrestrial life or wait for aliens to contact us.
Don’t Blame It on Depression That’s not what made the Germanwings co-pilot murder 149 people.
Even Lufthansa’s Exhaustive Psychiatric Tests Couldn’t Have Stopped a Tragedy Like the Germanwings Crash