World Topics

Mystery 'post-Ebola syndrome' emerges in West Africa

As the Ebola epidemic retreats across West Africa, international health authorities are turning their attention to the little understood long-term effects of the often-deadly virus on the survivors. There is little research on patients cured of the tropical fever, but the World Health Organization (WHO) has acknowledged that many are ...

Cosmic rays may damage the brains of astronauts

May 3, 2015

Cosmic rays may damage the brains of astronauts

Researchers said on Friday that long-term exposure to galactic cosmic rays, which permeate space, may cause dementia-like cognitive impairments in astronauts during any future round-trip Mars journey, expected to take at least 2½ years. In a NASA-funded study, mice exposed to highly energetic charged ...

Undersea volcano erupts off Oregon

May 3, 2015

Undersea volcano erupts off Oregon

An undersea volcano about 300 miles (480 km) off Oregon’s coast has been spewing lava for the past seven days, confirming forecasts made last fall and giving researchers unique insight into a hidden ocean hot spot, a scientist said on Friday. Researchers know of ...

May 2, 2015

Space radiation may harm astronauts' brains: study

Flying people to deep space — like to Mars or an asteroid — is high on NASA’s wish list, but research on mice suggested Friday that extended radiation exposure permanently harms the brain. Central nervous system damage and cognitive impairment were observed in lab ...

New avian flu viruses send U.S. scientists scrambling

May 1, 2015

New avian flu viruses send U.S. scientists scrambling

Three highly pathogenic avian flu viruses that have infected poultry and wild birds in the U.S. Midwest appear unlikely to present a significant risk to humans. But the presence of the viruses in North America has scientists scrambling to understand their potential long-term threat. ...

May 1, 2015

NASA craft falls from orbit onto Mercury

The only spacecraft ever to orbit Mercury ended its four-year tour with a crash on Thursday. NASA’s Messenger plunged from orbit as planned and slammed into the sun’s closest planet at about 8,750 mph (14,081 kph), creating a crater an estimated 52 feet (16 ...

NASA's Messenger orbiter slams into Mercury

May 1, 2015

NASA's Messenger orbiter slams into Mercury

NASA’s pioneering Messenger spacecraft ended its four-year study of the planet Mercury on Thursday by crashing into the planet’s surface, scientists said. Flight controllers at the Johns Hopkins University Applied Physics Laboratory in Maryland earlier estimated that Messenger, traveling at more than 8,700 mph ...

Spacecraft spots possible Pluto polar cap

Apr 30, 2015

Spacecraft spots possible Pluto polar cap

NASA’s Pluto-bound New Horizons spacecraft has spotted surface features on the icy world, including a possible polar cap, images released on Wednesday show. With 60 million miles (97 million km) left to go before its July 14 encounter, New Horizons already has been able ...

Winged dino sets science world aflutter

Apr 30, 2015

Winged dino sets science world aflutter

The discovery of a pigeon-sized dinosaur with bat-like wings has exposed bizarre twists in the early evolution of birds, said scientists in China Wednesday whose conclusions were immediately challenged. Named Yi qi, for “Strange Wing” in Mandarin, the creature was an odd and unexpected ...