Chinese and American scientists have jointly discovered a way to prevent the HIV virus spreading through the body.
Experts from the University of Science and Technology of China say that their most important finding is a small-molecule compound.
The compound can occupy a gap in a human cell ordinarily attacked by the HIV virus, experts were quoted by China Youth Daily yesterday as saying.
Usually the HIV virus enters a cell through this gap and begins duplicating itself immediately.
Parents should think twice before giving in to a middle-schooler's demands for a cell phone, some scientists say, because potential long-term health risks remain unclear.
Researchers have speculated for more than 10 years that the electromagnetic radiation emitted from cell phones may damage DNA and cause benign brain tumors, said Henry Lai, a bioengineering professor at the University of Washington.
"We don't know very much about the health effects of cell phone use on kids, but there are speculations," Lai said.
Indonesia and Germany signed an agreement this week to install a tsunami early warning system in the Indian Ocean. Though some of the pieces will be in place by October, it could turn out to be a race against time.
The quake that caused last year's devastating tsunami has increased the stress on other faults nearby, according to a study published this week. This has left the region primed for one or two major earthquakes, and possibly another tsunami.
A group of engineers has offered a solution for people who want a direct line to aliens - by broadcasting their phone calls directly into space.
People wanting to contact extraterrestrial beings through www.TalkToAliens.com can dial a premium rate US number and have their call routed through a transmitter and sent into space through a 3.2-metre-wide dish in central Connecticut, US.
US scientists announced that they have found the key to how AIDS virus attacks the body, which makes the creation of effective vaccines more promising. The discovery, presented at the 12th annual Conference on Retrovirus and Opportunistic Infections in Boston, and simultaneously published in newest issue of the British journal Nature, shows how HIV mutates its form, in turn provoking changes which permit it to enter cells.