News
- Materials Science
Cellulose that stiffens and softens
A material inspired by sea cucumbers morphs from rigid to soft.
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Altruistic twist in market economies
Democratic societies with market economies promote a moral ethic of cooperating with strangers who demand mutual sacrifices in joint ventures.
- Physics
Too speedy for gravity?
A new analysis suggests that five different spacecraft gained more speed as they flew past Earth than can be accounted for by Einstein's theory of gravitation.
- Astronomy
Supernova Outbreak: X rays signal earliest alert
Thanks to a lucky break and an overactive galaxy, astronomers report the earliest detection yet of a normal supernova—the explosive death of a massive star.
