News
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Copy Crab: DNA confirms that crab forms have several origins
New genetic evidence suggests that crabs aren't all close relatives and their characteristic shape evolved independently on numerous occasions.
- Materials Science
Thin Jet Flies Two for One: Double streams yield sheathed nanoballs, fibers
Researchers have used powerful electric fields to stretch liquids into ultrathin jets in which a stream of one liquid encloses the stream of another.
- Animals
Honey-Scented Elephants: Young males’ faces drip sweet signals
An Asian bull elephant just reaching maturity secretes a liquid from glands on its face that smells like honey.
- Health & Medicine
Broken Weapon: Mutation disarms HIV-fighting gene
A gene that once produced a small protein able to prevent HIV from infecting cells now lies unusable in the human genome.
