Tiniest hedgehog ever lived in a warmer Canada 52 million years ago, paleontologists say. Creature no bigger than a human thumb scientifically dubbed "tiny forest dweller".
Chemicals used to combat crop pests may be behind drop in populations of insect-eating bird species, study suggests. Pesticides leaching into soil, water may represent threat to other species as well, researchers say.
Observation of supernova reveals cosmic dust "factory" at work, astronomers say. Mystery of the origins of interstellar dust has long puzzled, they say.
Unaccounted-for vials of smallpox virus found at FDA-operated lab at the National Institutes of Health. CDC says testing confirmed presence of smallpox DNA.
Chimpanzees show a desire to be "dedicated followers of fashion," researcher says. Habit of placing grass stem in ear, begun by one chimp, has been taken up by the group.
Use of both aerobic and resistance exercise regimes found most effected in controlling type 2 diabetes, study finds. Lifestyles should include both if possible, researchers say.
Structure in skull of early human may be evidence of interbreeding with Neanderthals, finding suggests. Structure of inner ear resembles that previously thought unique to Neanderthals.
Fossil finds confirms largest bird ever to fly in Earth's skies, researchers say. From 55 million years ago, the 24-foot wings of the creatures would have been seen over every continent on the globe.
Bee species seeks to defend food source by loudly declaring 'don't mess with us.' Easily detectable signals meant to discourage competitors.
Much of today's Amazon rainforest was once much drier and devoid of trees, researchers say. Region would have been more like African savannah until 2,000 years ago, they say.
Cosmic collisions reason why Mercury is a 'freak' among solar system's rocky planets, scientists say. Planet has more iron than it should, they explain.
Shifting winds with climate change could increase melting rate of Antarctic ice, driving up sea levels around the world. Rises of up to 10 feet possible, researchers say.
Being alone and quiet too much for most people in a study, researchers found. Most said they would rather resort to giving themselves an electric shock just for the experience.
Marine shrimp with one of the most complex eyes in nature uses UV 'filters' to see. Mantis shrimp can see in frequencies far beyond those of human vision, an may be able to signal in secret in the very short UV range.
Buried ocean on Saturn's moon Titan is likely a "dead sea" and unlikely to be habitable by alien life, scientists say. Ocean under the icy surface is probably as salty as any here in Earth, they say.
Headbanging by a fan at a Motorhead concert left him with a blood clot on the brain, doctors say. He recovered, but only after needing surgery, they add.
NASA finalizes contract with Boeing for first stage of Space Launch System. First test flight of gargantuan booster set for 2017.
Astronomers using ultrasound to listen to the 'heartbeat' of young stars. Technique allows determining the age, lifestyle of a star, they say.
Plants can 'hear' caterpillars coming and react by bolstering defenses, study finds. Vibrations of munching predators serves as alarm.
Wasp species uses macabre building material -- the bodies of dead ants -- to protect the eggs in its nests. Behavior is seen nowhere else in nature, researchers say.
Genes from a long-extinct human lineage may have given modern humans in Tibet their adaptation to high altitudes. Gene is also sometimes called 'super athlete' gene.
Kangaroos' tails are essentially used as fifth legs, helping them efficiently move forward as they graze, a study finds. Kangaroos are the only animals to use their tails in this way, researchers say.
Ocean under the icy shell of Saturn's moon Titan is likely a salty "dead sea" unlikely to support life, researchers say. Oh, and it's slowly freezing solid.
Researchers combine living cells with 3D printed skeleton to create bio-bot that can be moved and controlled. Tiny bio-bots could have medical and other uses, they say.
Dwindling numbers of parrotfish that act as marine 'landscapers' by keeping reefs free of algae could be putting Caribbean coral reefs at risk. There's been a 50 percent decline in the region's coral during past decades, researchers say.
Genetic analysis of hair samples purported to be from Bigfoot or yetis comes up with lots of DNA. Unfortunately, it's all from known, modern-day animals like bears or wolves.
NASA puts satellite in orbit to measure levels of greenhouse gas CO2 in Earth's atmosphere. Two-year mission will sample all areas of the Earth every 16 days.
NASA scientists hail 10 years of science discoveries by Cassini spacecraft orbiting Saturn. Spacecraft's original four-year mission has been extended multiple times.
Fabien Cousteau beats underwater living record set by his grandfather Jacques in 1963. Younger Cousteau returns to the surface after 31 days underwater off Florida.
New kind of beetle discovered in the 'Everest of the caves' in Russia. World's deepest known cave is at least 7,000 feet deep.