News

Health & Medicine

Expanding antibiotic treatment in sub-Saharan Africa could save kids’ lives

Current guidelines limit treatment to infants. Giving antibiotics to at-risk kids under 5, too, has an indirect effect on infant survival, a new trial shows.

Physics

The world’s fastest microscope makes its debut

Using a laser and an electron beam, the microscope can snap images of moving electrons every 625 quintillionths of a second.

Space

The historic ‘Wow!’ signal may finally have a source. Sorry, it’s not aliens

One of the best possible signs of extraterrestrial communication may have an astrophysical explanation — albeit a weird one.

Astronomy

The nearest midsized black hole might instead be a horde of lightweights

Astronomers recently reported that the Milky Way star cluster Omega Centauri hosts an elusive type of black hole.