6,896 results
6,896 results for: Bears
- 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 […]
- Humans
From the April 5, 1930, issue
SPARROW-SIZE KINGFISHER The Celebes Wood Kingfisher (Ceycopsis fallax), shown on the cover of this week’s SCIENCE NEWSLETTER, is a bird scarcely as large as an English Sparrow. Similar kingfishers of tiny dimensions are found in various tropical countries. They are hunters as well as fishers and feed on insects and other life as well as […]
- Humans
From the June 14, 1930, issue
WELLAND CANAL Slightly more than a century after the falls and rapids of Niagara were first overcome for water transportation by a canal only 8 feet deep, there has been completed on practically the same site a mammoth structure that will pass giant 600-foot lake grain vessels up and down the 326.5-foot difference in elevation […]
- Anthropology
Hand and Brain
Get a handle on primate handedness research and its bearing on brain function at a Web site run by anthropologist M.K. Holder. Participate in ongoing research and listen to various primates sound off, from a screaming chimpanzee to a belching mountain gorilla. Go to: http://www.indiana.edu/~primate/index.html
- Humans
From the September 6, 1930, issue
alt=”Click to view larger image”> LIONS IN ALASKA Alaska, with its vast herds of caribou, its foxes and beaver, its mountain sheep and goats, and its great bears, black, brown, grizzly, and white, is one of the world’s game paradises; but 100,000 years ago, long before the slow-witted men who inhabited Europe thought to follow […]
