Technology Molecular logic gates help sort cells HOW do you colour-code a whole bunch of different objects using only one colour? It sounds impossible, but researchers hoping to tag cells with combinations of fluorescent dyes have done just that. They used a form of "molecular computing" that means similar dyes can be distinguished and so can be combined in myriad unique ways, … 51¶¯Âþ
Earth Weeds shall inherit the Earth FOR more than a decade, scientists have been warning of an impending collapse of global biodiversity – the sixth great extinction. Averting this massive species loss and the resulting pauperisation of ecosystems demands immediate action, they urge. What they don't realise is that this "extinction crisis" is no more preventable than previous extinctions caused by … Opinion
Earth Look out! Nuclear waste below One day a group of people walked into a cave and painted handprints all over the walls. Ten thousand years later, archaeologists have no idea why. To be fair to the artists in question, they probably didn't set out to create something that would make sense in 400 generations' time. Even if thoughts of the … Features
Life The word: Avocado NEXT time you serve avocado, your guests might be surprised to learn that its name is derived from the Aztec description of the plant it grows on: the testicle tree. How did the avocado get to be so called? The fruit originates from the forests of central America, and was originally the size of an … Regulars
Feedback Astronomical split A DARK corner of Feedback's soul is, we confess, almost looking forward to a breakaway International Astronomical Union (Pluto-Xenaist) faction seeking to reverse the recent planetary demotions. One astronomer, for example, writes (on condition of anonymity due to the sensitivity of the issues): "Poor Pluto. One must truly sympathise. After all, it is … Regulars