Search Content | Science News

Be a Champion for Science

Get your subscription to

Science News when you join.

Search Content

E.g., 02/21/2017
E.g., 02/21/2017
Your search has returned 4 images:
  • Handguns at a gun show in Las Vegas
  • cows grazing
Your search has returned 21 articles:
  • Feature

    Gun research faces roadblocks and a dearth of data

    Buying a handgun in Connecticut means waiting — lots of waiting. First comes an eight-hour safety course. Then picking up an application at a local police department. Review of the application (which includes a background check and fingerprinting) can take up to eight weeks. If approved, the state issues a temporary permit, which the buyer trades in at state police headquarters for a permanent...

    05/03/2016 - 15:00 Science & Society, Mental Health, Health
  • News

    EPA boosts estimate of U.S. methane emissions

    The U.S. Environmental Protection Agency, criticized for understating how much methane the United States spews into the atmosphere, has boosted its estimate of total U.S. methane emissions by 13 percent. That’s an increase of more than 3.4 million metric tons of the greenhouse gas and has the same long-term global warming impact as a year’s worth of emissions from about 20 million cars.

    ...

    04/15/2016 - 19:03 Pollution, Climate
  • Feature

    Getting creative to cut methane from cows

    View the video

    In a pasture outside Edmonton, Canada, you’ll find a few dozen cows doing what cows do: mostly eating. The average animal spends eight-plus hours a day filling its belly, or as is the case with cows, bellies. Along with that enormous appetite, cows are born with the ability to digest almost any plant they can chew, thanks to a multichambered stomach and a helpful army of...

    11/18/2015 - 16:36 Animals, Microbes, Climate
  • Educator Guides

    Find the current and past Science News in High Schools Educator Guides organized by the date of the issue in which the article appears.

    February 18, 2017Heat Record ShatteredHeat record article PDF | Full GuideGuide Summary | Heat Record Questions | Archive search | Discussion prompts | ActivityView heat record article online

    February 4, 2017Dino DoomsdayDino article PDF | Lucky ones ...

    09/14/2015 - 09:29
  • Feature

    The long and winding Colorado

    Standing on a mesa high above the town of Rifle, Colo., Andres Aslan is having a hard time staying quiet. The lanky geologist from nearby Colorado Mesa University normally speaks in a low-key professorial drone. But here, looking down at a sprawling river valley blazing with autumnal cottonwoods, his enthusiasm cranks up his volume. “This could be it,” says Aslan, gesticulating wildly. “This...

    01/10/2014 - 14:00 Earth, Planetary Science
  • Feature

    The 3-D Printing Revolution

    Joshua Pearce takes unusual satisfaction in strolling through Walmart. The shelves laden with toys, household items, tools and clothing inspire in him a certain smugness, a pride in American entrepreneurship. But it’s not because Pearce admires the chain as an empire built by a self-made man. Pearce swells with pride at Walmart because the store is full of mass-manufactured objects that he...

    02/20/2013 - 23:31 Technology, Computing
  • Math Trek

    Shuffling the cards: Math does the trick

    Here’s the rule: To assure cards get sufficiently mixed up, shuffle a deck about seven times. Mathematician, magician and card shark Persi Diaconis of Stanford University, along with David Bayer of Columbia University, created shock waves in Las Vegas when he figured that out back in 1992. Most dealers had been shuffling much less.

    But now Diaconis and his colleagues are issuing...

    11/07/2008 - 15:42 Numbers
  • Math Trek

    Unknotting knot theory

    Sometimes, a simple, even childish question turns out to be connected to the deepest secrets of the universe. Here’s one: How many different ways can you tie your shoelaces?Mathematicians have been puzzling over that question for a century or two, and the main thing they’ve discovered is that the question is really, really hard. In the last decade, though, they’ve developed some powerful new...

    10/31/2008 - 16:19 Numbers
  • News

    Salmon study: Dammed or not

    There could be little difference in how young salmon survive their journey down a free-flowing river versus the heavily dammed Columbia River system, says a controversial new study.

    A new system for tagging small fish allows biologists to monitor young salmon migration survival in a big, undammed river for the first time, David Welch of Kintama Research Corporation...

    10/27/2008 - 18:57 Life & Evolution, Other
  • News

    Long-Sought Laser? Standard microchips may gain speedy optical connections

    Even with fast personal computers, Internet goodies such as videos and podcasts often download at sluggish speeds. Now, an advance in laser technology promises to eliminate those and other nagging computer delays, its developers say.

    Engineers have long known how to wipe out such delays: Outfit ordinary computers with circuitry that sends and receives data as modulations of light...

    09/20/2006 - 14:09 Technology