News
- Physics
Cooled device unveils a quantum limit
A novel suspended device chilled near absolute zero demonstrates the existence of a basic unit, or quantum, of heat conductance—the first evidence of quantum mechanics in mechanical structures.
- Earth
Lawn Agent Cues Embryo Shortfall: Herbicide weeds out mice in the womb
Minuscule amounts of over-the-counter weed killers impair reproduction in mice.
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Cloning extends life of cells—and cows?
A study of cloned cows provides reassurance that cloned animals won't die prematurely and may even live extra-long.
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Do oxpeckers help or mostly just freeload?
A textbook example of mutualism—birds that ride around picking ticks off big African mammals—may not be mutually beneficial at all.
