Ever since scientists discovered influenza infecting American cows earlier this year, they have been puzzling over how it spreads from one animal to another. An experiment carried out in Kansas and Germany has shed some light on the mystery.

Scientists failed to find evidence that the virus can spread as a respiratory infection. Juergen Richt, a virologist at Kansas State University who helped lead the research, said that the results suggested that the virus is mainly infectious via contaminated milking machines.

Continue reading “How Does Bird Flu Spread in Cows? Experiment Yields Some ‘Good News.’” →

For 30 years, archaeologists have been digging at Jamestown, the first permanent British settlement in America. The trumpets, children’s shoes, pistols and millions of other unearthed objects have provided fresh clues to what life was like at the fort that settlers built in 1607 on the James River in Virginia.

Now, some of the most intriguing clues are coming from bones — not of the people who lived in Jamestown, but of the dogs.

Continue reading “Famine Drove Jamestown Settlers to Eat Native Dogs, DNA Reveals” →

For millions of years, mammoths lumbered across Europe, Asia and North America. Starting roughly 15,000 years ago, the giant animals began to vanish from their vast range until they survived on only a few islands.

Eventually they disappeared from those refuges, too, with one exception: Wrangel Island, a land mass the size of Delaware over 80 miles north of the coast of Siberia. There, mammoths held on for thousands of years — they were still alive when the Great Pyramids were built in Egypt.

Continue reading “The Last Stand of the Woolly Mammoths” →