A microscopic swimming robot unveiled by Chinese scientists could eventually be used for drug delivery or to clear arteries in humans, say researchers.
The 3 millimetre-long triangular machine was constructed by Tao Mei of the Chinese Academy of Sciences, Beijing, and colleagues from the University of Science and Technology of China.
Fears that bird flu could mix with human flu to create a highly infectious, deadly new strain heightened last week after Thailand reported that human flu is circulating in areas where there have been renewed bird flu outbreaks in poultry. The country does not have enough human flu vaccine to protect all workers against simultaneous infection by both viruses.
Dutch scientists have found that more than twice as many people as thought may have been infected during a bird flu outbreak in Dutch chickens in 2003.
The flu is not the same as the one now breaking out again in East Asia, but it shows once again that these viruses are capable of unpleasant surprises.
Cannabis may loosen the stiff and spastic muscles of multiple sclerosis sufferers, and not just their minds, a follow-up study has found.
The results contradict findings from the first phase of the study, where improvements seemed to be largely due to "good moods".
“There does seem to be evidence of some benefit from cannabis in the longer term that we didn’t anticipate in the short term study,” says John Zajicek, at Peninsula Medical School in Exeter, UK, and one of the research team.
Reports that a group set up as part of the Search for Extraterrestrial Life (SETI) has detected a radio transmission that it suspects could be a signal from an alien civilisation have been dismissed by the organisation.
"Sorry, but there's nothing new to report," said David Anderson, director of SETI@home.
"The candidate signal in question was essentially ruled out as an ET [extra-terrestrial] signal because its Doppler drift rate varied too widely," Anderson told ZDNet UK, adding that this fact had first been reported back in April.