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.
The University of Nottingham
A GIFT FOR YOU Male nursery web spiders (left) present nuptial gifts in the form of insect carcasses wrapped in silk
PREMAPHOTOS/Nature Picture Library
NOT-SO-FRESH AIR Ancient air embedded inside rock salt for 815 million years suggests that oxygen was already abundant when the first animals appeared. The microscopic air bubbles were trapped inside rectangular inclusions (one circled in red) in the rock.