iron

PRECIOUS METAL  Geochemists explore platinum, gold and other rare elements that are attracted to iron to understand how Earth's core formed billions of years ago. 

nursery web spiders

A GIFT FOR YOU  Male nursery web spiders (left) present nuptial gifts in the form of insect carcasses wrapped in silk

person vaping

VAPOR VIEW  The vapor from an e-cig can contain substantial amounts of toxic gases, a new study finds. And much of those toxicants trace to the solvent used to carry flavorings and any nicotine through the device.

cloned sheep

CLONE CLUB  Dolly the Sheep’s nearly identical sisters — Debbie, Denise, Dianna and Daisy — were produced from the same mammary gland tissue as Dolly. The new clones are not aging prematurely as was feared for Dolly.



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