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E.g., 09/19/2017
E.g., 09/19/2017
Your search has returned 72 images:
  • air pollution
  • map of next 15 total solar eclipses
  • Canaanite skeleton
Your search has returned 173 articles:
  • Feature

    The list of diseases linked to air pollution is growing

    To the residents of Donora, Pa., a mill town in a crook of the Monongahela River, the daily haze from nearby zinc and steel plants was the price of keeping their families fed. But on October 27, 1948, the city awoke to an unusually sooty sky, even for Donora. The next day, the high school quarterbacks couldn’t see their teammates well enough to complete a single pass.

    The town was...

    09/19/2017 - 07:00 Pollution, Climate, Health
  • Science Visualized

    Here are the paths of the next 15 total solar eclipses

    August's total solar eclipse won’t be the last time the moon cloaks the sun’s light. From now to 2040, for example, skywatchers around the globe can witness 15 such events.  

    Their predicted paths aren’t random scribbles. Solar eclipses occur in what’s called a Saros cycle — a period that lasts about 18 years, 11 days and eight hours, and is governed by the moon’s orbit. (Lunar eclipses...

    08/18/2017 - 14:30 Astronomy, Planetary Science
  • News

    Ancient DNA offers clues to the Canaanites’ fate

    DNA is setting the record straight on ancient Canaanites.

    For the first time, scientists have deciphered the complete genetic instruction manuals of Canaanites. By comparing five Canaanite genomes with those of other ancient and modern populations, the researchers identified the Canaanites’ ancestors and discovered their descendants, modern Lebanese people.

    The results, reported...

    07/27/2017 - 12:31 Anthropology, Ancestry, Genetics
  • News in Brief

    GM moth trial gets a green light from USDA

    Cabbage-chomping moths genetically modified to be real lady-killers may soon take flight in upstate New York. On July 6, the U.S. Department of Agriculture OK’d a small open-air trial of GM diamondback moths (Plutella xylostella), which the agency says do not pose a threat to human or environmental health.

    These male moths carry a gene that kills female offspring before they mature....

    07/14/2017 - 13:11 Agriculture, Genetics
  • Feature

    DNA evidence is rewriting domestication origin stories

    One lab full of rats looks pretty much the same as another. But visiting a lab in Siberia, geneticist Alex Cagan can distinguish rats bred to be tame from those bred to be aggressive as soon as he opens the lab door.

    “It’s a completely different response immediately,” he says. All of the tame rats “come to the front of the cage very inquisitively.” The aggressive rats scurry to the backs...

    07/06/2017 - 12:00 Genetics, Animals
  • News

    Primitive whales had mediocre hearing

    Early on, whale hearing may have been ho-hum.

    Unlike today’s whales that specialize in making  — and hearing — very high- or low-pitched sounds, early whales’ ears probably picked up noises somewhere in the middle, paleontologists Mickaël Mourlam and Maeva Orliac report June 8 in Current Biology.

    Looking at CT scans of ancient whale ear bones allowed the researchers, from the...

    06/09/2017 - 03:00 Paleontology, Animals, Evolution
  • News

    The Zika epidemic began long before anyone noticed

    The Zika virus probably arrived in the Western Hemisphere from somewhere in the Pacific more than a year before it was detected, a new genetic analysis of the epidemic shows. Researchers also found that as Zika fanned outward from Brazil, it entered neighboring countries and South Florida multiple times without being noticed.

    Although Zika quietly took root in northeastern Brazil in late...

    05/24/2017 - 13:00 Genetics, Microbes
  • Feature

    Chaco Canyon’s ancient civilization continues to puzzle

    Chaco Canyon is a land of extremes. Summer heat scorches the desert canyon, which is sandwiched between sandstone cliffs nearly two kilometers above sea level in New Mexico’s northwestern corner. Bitter cold sweeps in for winter. Temperatures can swing as many as 28 degrees Celsius during the course of a day. Through it all, Chaco Canyon maintains a desolate beauty and a craggy pride as home...

    05/17/2017 - 07:00 Archaeology, Anthropology
  • Feature

    Yes, statins protect hearts. But critics question their expanding use

    Cholesterol is so important to life that practically every human cell makes it. Cells use the compound to keep their membranes porous and springy, and to produce hormones and other vital substances. The body can make all the cholesterol it needs, but Americans tend to have a surplus, thanks in large part to too little exercise and too much meat, cheese and grease. Fifty years ago, researchers...

    05/03/2017 - 07:00 Health, Biomedicine
  • Feature

    Competing ideas abound for how Earth got its moon

    The moon’s origin story does not add up. Most scientists think that the moon formed in the earliest days of the solar system, around 4.5 billion years ago, when a Mars-sized protoplanet called Theia whacked into the young Earth. The collision sent debris from both worlds hurling into orbit, where the rubble eventually mingled and combined to form the moon.

    If that happened, scientists...

    04/04/2017 - 06:00 Planetary Science, Chemistry