More than a year after detecting the first confirmed gravitational waves, researchers were busy at the Laser Interferometer Gravitational-wave Observatory (LIGO) in Livingston, La., upgrading the massive instrument. (LIGO lab)
Our sun was still dim. Waves crashed on martian beaches. Life was emerging on Earth.
That’s when the ghosts of two dead stars — black holes dozens of times more massive than our sun — merged in a far-off corner of the universe. In their final moments, t ...read more
The underwater wreckage of a B-25 Mitchell bomber from World War II near Papua New Guinea. Credit: Project Recover
About 75 years ago, the North American B-25 Mitchell bomber became famous as the twin-engined plane that helped the United States launch the first retaliatory attack on the Imperial Japanese homeland during World War II. The medium bombers mainly deployed in the Pacific theater of war, where they often served as low-flying gunships that attacked both ...read more
For bumblebees, big cities are a bummer. Layers of asphalt, concrete, brick and metal add up to fewer places for the insects to nest. But one big city—Detroit—reverses that trend. That means shrinking cities might be a growing opportunity for at-risk pollinators.
Bumblebees (species with the genus name Bombus) are, like other bees, in trouble. Their numbers and diversity are decreasing across North America. Other native wild bees—the insects that have been ...read more
