Less than a year after the World Health Organization declared Zika is no longer a public health emergency, the virus seems to have fallen from public consciousness, at least outside of heavily affected areas. The mosquito-borne virus staged a massive assault on the Western Hemisphere in 2015 and 2016 (SN: 12/24/16, p. 19), but this […]
ANAHEIM, Calif. — Nearly half of U.S. adults now have high blood pressure, thanks to a new definition of what constitutes high: 130/80 is the new 140/90. That means that 103 million people — up from 72 million under the old definition — need to make diet and exercise changes and, in some cases, take […]
Astronomers have spotted a spiral galaxy more ancient than any seen before. The galaxy, called A1689B11, emitted its light 11 billion years ago, just 2.6 billion years after the Big Bang. Researchers had previously reported a spiral galaxy that dates to 10.7 billion years ago. Astronomer Tiantian Yuan at Swinburne University of Technology in Melbourne, […]
Testosterone may tamp down asthma caused by inhaling pollen, dust or other airborne allergens. That’s partly why more women suffer from the lung disease than men, new research suggests. The male sex hormone acts on a group of immune cells that are part of the first line of the body’s defense against invaders. These cells […]
James Davis used to be an avid outdoorsman. He surfed, hiked, skateboarded and rock climbed. Today, the 48-year-old from Albuquerque barely gets out of bed. He has the most severe form of multiple sclerosis, known as primary progressive MS, a worsening disease that destroys the central nervous system. Diagnosed in May 2011, Davis relied on […]
There’s stiff competition for the most elaborate eyeballs in the animal kingdom, but a mollusk that turns up on dinner plates might be a finalist. Each of a scallop’s eyes — it has up to 200 of them, each about a millimeter in diameter — contains millions of perfectly square, flat crystals that build up […]
A new type of 3-D printing ink has a special ingredient: live bacteria. Materials made with this “living ink” could help clean up environmental pollution, harvest energy via photosynthesis or help make medical supplies, researchers report online December 1 in Science Advances. This study “shows for the first time that 3-D printed bacteria can make […]
OXON HILL, Md. — Even as technological advances allow astronomers to peer more deeply into the cosmos than ever before, new technologies also have the potential to create blinding pollution. Three sources of pollution — space debris, radio interference and light pollution — already are particularly worrisome. And the situation is getting worse. In the […]
Nerve cells in the brain make elaborate connections and exchange lightning-quick messages that captivate scientists. But these cells also sport simpler, hairlike protrusions called cilia. Long overlooked, the little stubs may actually have big jobs in the brain. Researchers are turning up roles for nerve cell cilia in a variety of brain functions. In a […]
Toad versus bombardier beetle is almost a fair fight. Toads are hugely bigger, can tongue-strike in an eyeblink and swallow all kinds of nasty stuff. But bombardier beetles can shoot hot steam and noxious chemicals from their back ends. In a lab face-off, 43 percent of Pheropsophus jessoensis bombardiers escaped alive after being swallowed by […]