Science

3 billion birds have been lost in U.S. and Canada since 1970

Illustration of vanishing bird
Illustration: Aïda Amer/Axios

Human activity has decimated roughly 29% (almost 3 billion) of bird populations over the past 50 years in the U.S. and Canada, including meadowlarks, swallows and sparrows, scientists announced Thursday.

Why it matters: In addition to suffering pervasive losses in several groups of birds, North America has also reached a "widespread ecological crisis" that is affecting other activities like spring migration, food production and pest control, the scientists warn.

NASA emails reveal agency's surprise at asteroid's near-miss of Earth

NASA's logo.
Photo: Space Frontiers/Getty Images

Internal NASA communications show the agency's surprise after a football-field-sized asteroid narrowly missed Earth in July, according to emails acquired by BuzzFeed News via a Freedom of Information Act request.

Why it matters: The emails show that NASA officials believe the agency is lacking necessary infrastructure to reliably detect asteroids.