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Your search has returned 17785 articles:
  • Letters to the Editor

    Readers question climate’s freshwater effects

    Water woes

    A recent survey of lakes around the globe found that from 1985 to 2009, most warmed while only several cooled, Alexandra Witze reported in “In hot water” (SN: 5/13/17, p. 18). Rising temperatures have consequences for every part of a lake’s food web, from algae to walleye to freshwater seals.

    “This article indicates that no pattern could be found to predict which lakes would...

    06/14/2017 - 10:47 Climate, Genetics
  • Context

    Top 10 discoveries about waves

    Physics fans are a lot like surfers. Both think waves are really fun.

    For surfers, it’s all about having a good time. For physicists, it’s about understanding some of nature’s most important physical phenomena. Yet another detection of gravitational waves, announced June 1, further reinvigorates the world’s science fans’ excitement over waves.

    Waves have naturally always been a...

    06/14/2017 - 09:00 History of Science
  • Feature

    The opioid epidemic spurs a search for new, safer painkillers

    Last year, Joan Peay slipped on her garage steps and smashed her knee on the welcome mat. Peay, 77, is no stranger to pain. The Tennessee retiree has had 17 surgeries in the last 35 years — knee replacements, hip replacements, back surgery. She even survived a 2012 fungal meningitis outbreak that sickened her and hundreds of others, and killed 64. This knee injury, though, “hurt like the...

    05/30/2017 - 13:00 Health, Chemistry, Biomedicine
  • Screentime

    Citizen scientists join the search for Planet 9

    Astronomers want you in on the search for the solar system’s ninth planet.

    In the online citizen science project Backyard Worlds: Planet 9, space lovers can flip through space images and search for this potential planet as well as other far-off worlds awaiting discovery.

    The images, taken by NASA’s Wide-field Infrared Survey Explorer satellite, offer a peek at a vast region of...

    05/29/2017 - 07:00 Planetary Science, Science & Society
  • 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

    Jumping genes play a big role in what makes us human

    Face-to-face, a human and a chimpanzee are easy to tell apart. The two species share a common primate ancestor, but over millions of years, their characteristics have morphed into easily distinguishable features. Chimps developed prominent brow ridges, flat noses, low-crowned heads and protruding muzzles. Human noses jut from relatively flat faces under high-domed crowns.

    Those facial...

    05/16/2017 - 07:00 Genetics, Human Evolution, Molecular Evolution
  • News

    Naked singularity might evade cosmic censor

    Certain stealthy spacetime curiosities might be less hidden than thought, potentially exposing themselves to observers in some curved universes.

    These oddities, known as singularities, are points in space where the standard laws of physics break down. Found at the centers of black holes, singularities are generally expected to be hidden from view, shielding the universe from their...

    05/15/2017 - 09:00 Physics
  • Context

    The first Cassini to explore Saturn was a person

    As the Cassini spacecraft plunges toward its death on Saturn, the world’s knowledge of the famous ringed planet continues to accumulate. Thanks to years of observations by the versatile probe, astronomers now know Saturn as intimately as macaroni knows cheese. But still hardly anyone outside the world of astronomy knows anything about Cassini — and I don’t mean the spacecraft, but the guy it...

    05/15/2017 - 07:00 History of Science, Astronomy
  • News

    Selfish genes hide for decades in plain sight of worm geneticists

    View the video

    A strain of wild Hawaiian worms has helped unmask long-studied genes as just plain selfish. The scammers beat the usual odds of inheritance and spread extra fast by making mother worms poison some of their offspring.

    Biologists have for decades discussed how two genes in the familiar lab nematode Caenorhabditis elegans might help embryos build their organs. Working...

    05/11/2017 - 15:13 Genetics, Evolution, Animals
  • News

    Oxygen on comet 67P might not be ancient after all

    Oxygen on comets might not date all the way back to the birth of the solar system.

    Instead, interactions between water, particles streaming from the sun and grains of sand or rust on the comet’s surface could generate the gas. Those interactions could explain the surprising abundance of O2 detected in the fuzzy envelope of gas around comet 67P/Churyumov-Gerasimenko in 2015 (SN: 11/28/15...

    05/08/2017 - 12:28 Planetary Science