Lloyd Morrisett, co-creator of "Sesame Street," dies at 93
Morrisett has left "an outsized and indelible legacy among generations of children the world over," Sesame Workshop said.
Doomsday clock hits 90 seconds to midnight
The Bulletin of Atomic Scientists warns that "unprecedented danger" has pushed the world closer than ever to catastrophe: "We are on the brink of a precipice."
Iceberg about the size of two New York Cities breaks off Antarctica
This is the second time in two years that the Brunt Ice Shelf has had a major break-off.
NASA gets best look yet at the "deepest, coldest ices" in space
The icy ingredients studied in a molecular cloud 500 light-years away provide a "spectral snapshot" of the origins of space bodies.
Dolphins return to NYC's Bronx River
The NYC Parks Department said it's believed the dolphins "naturally found" their way back to the river as conditions continue to improve after years of pollution.
Newborn right whale calf found dead under North Carolina pier
The whale was last seen alive swimming alone off North Carolina's coast without its mother.
Is offshore wind development a threat to whales? Here's what to know.
Nine dead whales have washed ashore in New Jersey and New York in recent months. Some are blaming offshore wind energy sites, but federal officials are pushing back.
Massive "Toadzilla" as big as a newborn baby found in Australia
Toxic cane toads are usually the size of a teacup, but Toadzilla is the size of a newborn human baby and will eat anything that fits in its mouth.
Adrift sailor survives 24 days at sea with ketchup and seasonings
The 47-year-old man accidentally drifted from St. Maarten in the Caribbean last month and ended up near Colombia with only a couple of condiments on board to help him survive.
True extent of global warming masked by atmospheric dust, study finds
The amount of dust in the atmosphere has increased, and new research helps explain what that means for the climate.
Greenland ice sheet hits hottest temperatures in 1,000 years
The study's lead author said there is "almost zero" chance that anything but human-caused climate change is to blame for the sharp rise in temperature.
Pennsylvania woman charged in deaths, dismemberment of parents
The district attorney said they walked into the home Verity Beck shared with her parents and found a chainsaw and "signs of extreme trauma."
Another North Carolina power substation damaged by apparent gunfire
The North Carolina substation damaged in the apparent gunfire is not far from Moore County, where two other substations were attacked by gunfire in early December.
Greta Thunberg detained by German police at coal mine protest
Thunberg has been protesting in and near the German village of Lüetzerath, an abandoned area that an energy company is seeking to demolish in the quest to mine coal.
Beavers are back in southern England county for first time in 400 years
Two beavers named Hazel and Chompy have been released on a mission to help local ecosystems – and even fight climate change.