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Mechanical 'artificial hearts' can be used to return severely failing hearts to their normal function, potentially removing the need for heart transplantation, according to new research.

The mechanical devices, known as Left Ventricular Assist Devices (LVADs), are currently used in patients with very severe heart failure whilst they await transplantation. The new study, published in the New England Journal of Medicine, shows that using an LVAD combined with certain drug therapies can shrink the enlarged heart and enable it to function normally once the LVAD is removed.

For the study, researchers from Imperial College London and the Royal Brompton and Harefield NHS Trust gave the full combination therapy to 15 severely ill patients. Of these 15, 11 recovered.

Astronomers using the Subaru telescope in Hawaii have looked 60 million years further back in time than any other astronomers, to find the most distant known galaxy in the universe. In doing so, they are upholding Subaru's record for finding the most distant and earliest galaxies known. Their most recent discovery is of a galaxy called I0K-1 that lies so far away that astronomers are seeing it as it appeared 12.88 billion years ago.

Demand from rich Chinese for Indian tiger pelts and parts used in traditional medicine fuels poaching and may lead to the extinction of the species in the wild, conservationists have warned.

Trade of tiger pelts from India into Chinese-ruled Tibet was flourishing despite laws banning the move, a report released in New Delhi by two conservation groups said Wednesday.

The Wildlife Protection Agency and Environment Investigation Agency estimate only 1,500 to 2,000 wild Royal Bengal Tigers are left in India.

For soldiers injured in combat today, the survival rate is 90 percent or higher--a significant improvement even since the Gulf War in the early 1990s, according to Col. W. Bryan Gamble, M.D., Commander of Landstuhl Regional Medical Center in Germany. Dr.

New research suggests that choosing a mate may be partially determined by your genes. A study published in Psychological Science has found a link between a set of genes involved with immune function and partner selection in humans.

Vertebrate species and humans are inclined to prefer mates who have dissimilar MHC (major histocompatibility complex) genotypes, rather than similar ones. This preference may help avoid inbreeding between partners, as well as strengthen the immune systems of their offspring through exposure to a wider variety of pathogens.

The study investigated whether MHC similarity among romantically involved couples predicted aspects of their sexual relationship.