‘Windows of opportunity’ crucial for cutting Chesapeake nutrient, sediment loads

Researchers analyzed eight years of data from 108 sites in the Chesapeake Bay Program’s nontidal monitoring network, looking at daily-scale records of flow and corresponding loads of nitrogen, phosphorus and suspended sediment. Credit: Heather Preisendanz research group/Penn State The vast majority of nutrients and sediment washed into streams flowing into the Chesapeake Bay are picked […]

Giant Aztec skull ‘tower’ unearthed in Mexico

Archaeologists in Mexico City have discovered 119 human skulls arranged in a “trophy” tower that the Aztecs built about 500 years ago, according to Mexico’s National Institute of Anthropology and History.  The new finding shows just how extensive the tower is; in 2015, researchers discovered part of the tower — thought to be the main […]

Tracing the Moisture That Nourishes the World’s Highest Glacier

The Khumbu Glacier snakes down from the summit of Mount Everest into northeastern Nepal. The highest glacier in the world, it’s famous for being a treacherous rite of passage for Everest mountaineers. However, the Khumbu Glacier, along with others nearby, is also a key source of water for downstream communities in the Hindu […]

Gifts to help your friends keep their new plants alive

Nothing cuter than leafy babies. (Markus Spiske / Unplash/) It started with a harmless cactus. It continued with a succulent or two. Before you knew it, your friends’ walls were covered in vines, and they were asking you where might be the best spot for a monstera. If your friends have recently opted to find […]

Silica the best environmental alternative to plastic microbeads, finds study

Following bans on plastic microbeads in wash-off cosmetics, a new study weighs up the environmental costs of alternatives. Microbeads have been included in personal care and cosmetic products ranging from toothpastes and sunscreen to body scrubs and industrial hand cleaners, usually to improve qualities like abrasiveness. Microbeads are small, manufactured plastic pellets, typically measuring less […]

Ancient DNA continues to rewrite corn’s 9,000-year society-shaping history

Three roughly 2,000-year-old corn cobs from the El Gigante rock shelter site in Honduras. These corn cobs were genetically analyzed by an international team of scientists.In the Dec. 14 issue of the journal the Proceedings of the National Academy of Sciences, Logan Kistler, curator of archaeogenomics and archaeobotany at the Smithsonian’s National Museum of Natural […]

First doses of a coronavirus vaccine was given in New York today

New York, the worst-hit state at the start of the pandemic, just became the first to administer a coronavirus vaccine outside of clinical trials, kicking off a long, massive effort to vaccinate the American people.  Around 9 a.m. E.T. on Monday (Dec. 14), the very first dose of Pfizer and BioNTech’s coronavirus vaccine was given […]

Fertilizer made from urine could enable space agriculture — ScienceDaily

In extreme environments, even the most ordinary tasks can seem like unsurmountable challenges. Because of such difficulties, humanity has, for the most part, settled on grounds that were favorable for harvesting crops, herding cattle, and building shelters. But as we seek to expand the limits of human exploration, both on earth and in space, the […]

A Robust Proxy for Geomagnetic Reversal Rates in Deep Time

North is north, until it isn’t. Earth’s magnetic field has repeatedly reversed itself, with magnetic north sometimes residing closer to today’s South Pole and vice versa. The time between these global-scale swaps has ranged from tens of thousands to millions of years, and the frequency of reversals may be linked to processes in […]