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摘要

Rising sea levels threaten to wash away turtles' nests and babies -and could damage the eggs they bury on beaches. A team has found that when turtle eggs are soaked in salt water, the number that successfully hatch falls. That's one expensive rock. An asteroid worth an estimated $3 trillion whizzed past Earth on Sunday. Asteroid 2011 UW-158 is thought to have a core made of platinum - a metal that firms like Planetary Resources hope to mine. Tiny particles can damage tiny objects, like a microelectronic chip -or an ant. The insects clean their antennae with microscopic bristles, combs and brushes, tools that could Inspire cleaning systems for microelectronics.