Catherine Brahic
It has been debated for nearly four decades but no one has yet been able to prove it is chemically possible. Now good evidence suggests that birds can actually "see" the lines of the Earth's magnetic field.
Klaus Schulten of the University of Illinois, proposed forty years ago that some animals – including migratory birds – must have molecules in their eyes or brains which respond to magnetism. The problem has been that no one has been able to find a chemical sensitive enough to be influenced by Earth's weak geomagnetic field.
Now Peter Hore and colleagues at the University of Oxford have found one.
Cryptochromes are a class of light-sensitive proteins found in plants and animals, and are thought to play a role in the circadian clock, in regulating plant growth, and timing coral sex. A few years ago, Henrik Mouritsen of the University of Oldenburg in Germany showed that they were present in the retinal neurons of migratory garden warblers, and that these cells were active at dusk, when the warblers were performing magnetic orientation.
Weak but radical
Cryptochromes have not yet been made in the lab and obtaining them is difficult, but Hore's team has ...   more »

The Wall Street Journal published an op-ed (King and the Jews, April 30) by Clarence Jones, who had been Martin Luther King Jr's personal attorney. He offers interesting insight into King's views:
"I was his lawyer and one of his closest advisers, and I can say with absolute certainty that Martin abhorred anti-Semitism in all its forms, including anti-Zionism."
From www.wsj.com
Wall Street Journal
King and the Jews
By CLARENCE B. JONES
Earlier this month, at a Los Angeles event for the national African-American fraternity Kappa Alpha Psi, the keynote speaker launched into an anti-Semitic tirade – directed at the fraternity's guest of honor. The socking episode shows just how far we've strayed from the original vision of the civil rights movement – and how far we have yet to travel to realize that vision.
The guest of honor, Daphna Ziman, an Israeli-American woman, had just received the Tom Bradley Award for generous philanthropy and public service. But instead of praise, the Rev. Eric
Lee berated her. "The Jews," he claimed, "have made money on us in the music business and we are the entertainers, and they are economically enslaving us." (Mr. Lee would later apologize to Ms. Ziman.)
It ...   more »

By MICHAEL HANLON   
Sponges can do it and so can starfish. For flatworms it is no problem, and both lizards and salamanders can pull off the same trick.
The trick in question is regeneration, the almost magical property possessed by some animals to regrow whole limbs, tails, other body parts or organs if they are lost in an accident.
This spontaneous regeneration has only recently begun to be understood and it involves an incredibly complex interplay of genes and tissues.
What is known is that regeneration does not - except to a very limited degree - occur in humans or, indeed, in any mammals. Cut off a man's leg or a rabbit's foot and the best you can hope for is a scar covered stump.
Cut off a finger-tip and, unless you find a surgeon to sew it back on again promptly, you will simply have to put up with one digit shorter than the rest.
That is, if reports are to be believed, unless you are Lee Spievack, a model aircraft enthusiast from Cincinnati in the U.S. who, in 2005, accidentally sliced an inch off the tip of his index finger with a model aeroplane propeller.
He was ...   more »

Some computer keyboards harbour more harmful bacteria than a toilet seat, research has suggested.
Consumer group Which? said tests at its London offices found equipment carrying bugs that could cause food poisoning.
Out of 33 keyboards swabbed, four were regarded as a potential health hazard and one harboured five times more germs than one of the office's toilet seats. Microbiologist Dr Peter Wilson said a keyboard was often "a reflection of what is in your nose and in your gut".
During the Which? tests in January this year, a microbiologist deemed one of the office's keyboards to be so dirty he ordered it to be removed, quarantined and cleaned.
It had 150 times the recommended limit for bacteria - five times as filthy as a lavatory seat tested at the same time, the research found.
 Should somebody have a cold in your office, or even have gastroenteritis, you're very likely to pick it up from a keyboard
Dr Peter Wilson Consultant microbiologist 
The equipment was swabbed for bugs, such as those that can cause food poisoning like E.coli and staphylococcus aureus.
Dr Wilson, a consultant microbiologist at University College London Hospital, told BBC Radio 5 Live sharing a keyboard could ...   more »

By Thomas Harding, Defence Correspondent
China has secretly built a major underground nuclear submarine base that could threaten Asian countries and challenge American power in the region, it can be disclosed.
Satellite imagery, passed to The Daily Telegraph, shows that a substantial harbour has been built which could house a score of nuclear ballistic missile submarines and a host of aircraft carriers.
Satellite image of the harbour: click to enlarge
In what will be a significant challenge to US Navy dominance and to countries ringing the South China Sea, one photograph shows China’s latest 094 nuclear submarine at the base just a few hundred miles from its neighbours.
Other images show numerous warships moored to long jettys and a network of underground tunnels at the Sanya base on the southern tip of Hainan island.
Of even greater concern to the Pentagon are massive tunnel entrances, estimated to be 60ft high, built into hillsides around the base. Sources fear they could lead to caverns capable of hiding up to 20 nuclear submarines from spy satellites.
The US Department of Defence has estimated that China will have five 094 nuclear submarines operational by 2010 with each capable of carrying 12 JL-2 nuclear ...   more »