6,896 results
6,896 results for: Bears
-
Pulling antioxidants starves cancers
Realizing that many cancers depend on antioxidants for their survival, researchers have successfully designed a dietary strategy that suppresses breast cancer growth and spread, at least in animals.
- Paleontology
Rocks yield clues to flower origins
A distinctive organic chemical related to substances produced by modern flowering plants has been found in ancient fossil-bearing sediments, possibly helping to identify the ancestral plants that gave rise to flowers.
- Health & Medicine
Natural antidepressant has its limits
St. John's wort, a popular ingredient in herbal remedies, may not help people with moderate or severe forms of depression.
- Anthropology
Human ancestors made ancient entry to Java
Layers of hardened volcanic ash on the Indonesian island of Java have yielded evidence that Homo erectus reached eastern Asia by 1.5 million years ago and remained there until about 1 million years ago.
- Astronomy
Gamma-ray bursts reveal distant galaxies
A gamma-ray burst recorded Feb. 22, one of the brightest ever detected, is proving to be the strongest evidence so far that these cosmic flashbulbs originate in star-forming regions of distant galaxies and are generated by the explosive death of massive stars.
-
When parents let kids go hungry
Researchers comparing Northern and Southern birds have confirmed a prediction about parents protecting themselves at their offsprings' expense.
- Paleontology
Did fibers and filaments become feathers?
A variety of filamentary structures on the fossil of a small theropod dinosaur recently found in China may provide new insight into the evolution of feathers.
-
For some birds, Mr. Wrong can be alright
What looks like the ultimate bad choice in romance—a mate from a different species—in some conditions may not be so dumb after all.
-
Dolphins may seek selves in mirror images
Dolphins apparently recognize their own reflections.
- Math
Testing for Divisibility
The crisp new dollar bill that I have just taken from my wallet bears the serial number 24598176. It’s easy to tell that the number is exactly divisible by 2 but not by 5. Is it divisible by 3? by 4? by 11? In a 1962 Scientific American article, Martin Gardner noted that during the […]
- Math
Squaring Circles
Cutting a circle into pieces and reassembling the fragments to form a square is a tricky proposition.
-
Touring the Poles
Hunting for bear leads to uncountable infinities.
