STOCKHOLM - FIRST-TIME mothers who give birth after the age of 35 are more than twice as likely as younger mums to suffer postpartum psychosis that could involve a danger to the newborn child, a Swedish study showed on Tuesday.

WASHINGTON - AS THE temperature across the US has gotten warmer, the purple finch has been spending its winters more than 640km farther north than it used to. And it is not alone.

An Audubon Society study set for release on Tuesday found that more than half of 305 birds species in North America, a hodgepodge of species that includes robins, gulls, chickadees and owls, are spending the winter about 56km farther north than they did 40 years ago.

PARIS - RESEARCHERS spanning three continents have pointed the finger at nine flawed genes after carrying out the largest-ever trawl through human DNA to search for inherited risks of a heart attack.

Variants of genes located in chromosomes 2, 3, 6, 12 and 21 boost the risk of myocardial infarction, according to five studies published online on Sunday in the latest issue of the journal Nature Genetics.