6,775 results
6,775 results for: Bears
- Astronomy
Shades of Venus
On June 8, for the first time in 122 years, the silhouette of Venus will move across the face of the sun.
- Humans
From the September 23, 1933, issue
LEAFY SUCCULENTS SOLVE PROBLEM SET BY DESERT Desert plants have a particularly hard problem to solve, set by that old Sphinx, the desert itself, and if they fail to solve it, the penalty is the same as that exacted in the old Greek myth–they must die. They must spread a sufficient chlorophyll surface to the […]
- Tech
Dream Machines from Beans: Legume proteins provide motion
Plant proteins swell and shrink in response to calcium, sparking new ideas for micromachines.
- Earth
Nonstick but not nontoxic
A proliferating pollutant shed by nonstick products and surfactants caused neonatal deaths and developmental impairments in tests with rodents.
- Materials Science
A new carbon nanotool springs to life
Physicists have pulled out the inside cylinders of multiwall carbon nanotubes, as if expanding a telescope, indicating how the devices may serve as tiny bearings and springs in future nanomachines.
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19304
I was dismayed to see you publish an unsubstantiated and highly misleading claim that welfare “reform” is not harming children. The study dealt with the atypical welfare mothers able to find sustainable employment. For them, I don’t doubt that having enough money rather than too little would be an improvement. Unmentioned are the many unskilled […]
- Humans
From the December 16 & 23, 1933, issues
STRENGTH OF CRATES TESTED BY TOSSING An important phase of the work of the timber mechanics department of the U.S. Forest Products Laboratory at Madison, Wis., has been to perfect the designing and nailing of these boxes so that their durability is greater. Chemically treated nails and reinforcement by diagonal braces have given more rigidity […]
- Humans
From the December 16 & 23, 1933, issues
STRENGTH OF CRATES TESTED BY TOSSING An important phase of the work of the timber mechanics department of the U.S. Forest Products Laboratory at Madison, Wis., has been to perfect the designing and nailing of these boxes so that their durability is greater. Chemically treated nails and reinforcement by diagonal braces have given more rigidity […]
- Earth
North vs. Northwest: Lewis and Clark diaries provide directional clue
Observations from the Lewis and Clark expedition may offer insight into Earth's magnetic field.
- Health & Medicine
Born to Heal
The controversial strategy of screening embryos to produce donors for siblings raises hopes and presents new ethical dilemmas.
- Tech
Body Builders
By growing stem cells on three- dimensional polymer scaffolds, tissue engineers hope to mimic natural tissue development and ultimately produce replacement body parts.
- Astronomy
Black Hole Life Preserver: Don’t get sucked in without one
By temporarily counteracting a black hole's tremendous tidal forces, a proposed black hole life preserver would slightly lengthen the life and shorten the agony of anyone exploring one of these gravitational beasts.
