6,907 results
6,907 results for: Bears
- Earth
Ash Clouds: Severe storms can lift smoke into stratosphere
New field observations, satellite images, and computer models suggest that a severe thunderstorm, enhanced by heat from forest fires, can boost soot, smoke, and other particles as far as the lower stratosphere, an unexpected phenomenon.
- Astronomy
Cradled galaxies betray violent past
Hubble snaps ‘the Penguin’ and its egg-shaped companion.
- Life
Ancient horse’s DNA fills in picture of equine evolution
An entire genome compiled from a 700,000-year-old bone yields new information about equine history.
- Genetics
Technique inactivates Down-causing chromosome
Though far from a cure, the advance could eventually lead to gene therapy that alleviates some symptoms.
- Life
Rogue genes on X chromosome turn on in testicles
Chunks of rapidly evolving DNA could affect sperm production in males.
- Animals
Eye-tracking cameras show peahens’ wandering gaze
Data show that female birds are not so riveted by their suitors’ magnificence
- Humans
Y chromosome analysis moves Adam closer to Eve
A pair of genetic studies has pushed back age of men's most recent common ancestor.
- Life
Evolution of mammalian monogamy remains mysterious
Two large studies reach opposing conclusions about why males stay with females.
- Materials Science
Toylike blocks make lightweight, strong structures
Bucking trend toward reducing numbers of parts, MIT engineers suggest building planes from thousands of identical pieces.
- Astronomy
‘Space beads’ push back origins of iron working
Ancient Egyptians used advanced techniques to make beads out of 'metal from the sky.'
- Planetary Science
Cometlike crashes produce building blocks of life
Amino acids in collision residue support importance of extraterrestrial impacts.
- Humans
From the March 8, 1930, issue
LEAVES OLDER THAN GRAND CANYON FOUND Fossil remains of plants found in the walls of the Grand Canyon show that many millions of years ago stunted vegetation of very singular aspect grew in a great, red, sandy floodplain under a semi-arid climate in northern Arizona. This great red land has been found by Dr. David […]
