A 10,000-year-old dog from an archaeological site near Eldred, Ill., known as the Koster site, where the earliest known dogs in the Americas were found.
Wild dogs, apex predators missing from Gorongosa National Park for decades, have been reintroduced and are slowly making a comeback, part of an ongoing experiment in reviving the park ecosystem after years of devastating war.
NASA’s Galileo spacecraft appears to have flown through a plume erupting from Jupiter’s moon Europa more than 20 years ago.
The colony of king penguins on the Île aux Cochons, or Pig Island, in 1982, when researchers last counted its population.
“The domestic dog is selected for so many different things,” said one researcher conducting the experiment. The fox is only selected for friendliness.
The landing site for the Mars InSight mission is “as close to a 100 kilometer-long parking lot as we could find anywhere,” said the mission’s principal investigator.
Over the past 17 years, the numbers of some bird species in French farming regions have dropped considerably. Meadow pipits have declined by 68 percent.
One of these outfits worn in Dr. Tracy Vaillancourt's study on female aggression provoked a sort of "mean girl" form of indirect aggression. The other attracted little notice at all.
Dr. Odile Madden, of the Getty Conservation Institute in Los Angeles, holding a piece of degrading plastic for use in trying out new methods of preservation.
Scientists found that the tough exteriors of cockroaches help them keep moving without losing much momentum when they bump into things.
Musk oxen, massive mammals that live on Arctic tundra, are seeing their numbers dwindle as warmer, rainier winters limit access to food, researchers report.
A whistling kite hovering over Queensland, Australia. Whistling kites are the so-called “firehawks,” said to spread bush fires to drive out prey.
A transparent hatchetfish, retrieved by researchers from the Woods Hole Oceanographic Institution, which is seeking to understand better the creatures that occupy the sea from 600 to 3,300 feet deep.
The Caño Cristales in Colombia, home to Macarenia clavigera, which turns the river bright colors in the rainy season. It has become a tourist attraction, but oil reserves nearby have pitted the government against a petroleum company.
A piece of plastic polymer about to be destroyed under ultraviolet light.
Employees of the Baksan Neutrino Observatory in southern Russian gather at its entrance to take an electric trolley thousands of feet underground to the facility's laboratories.
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