Science

Science

[:es]Birds versus bees: Here are the winners and losers in the great pesticide trade-off[:]

Farms are battlefields, pitting growers against rapacious pests and aggressive weeds in never-ending, costly campaigns that often involve chemical weapons. Those weapons, alas, also harm innocent bystanders such as bees, fish, and crustaceans. Now, a large study charts epic shifts that have occurred in recent decades as U.S. farmers have changed their arsenal of pesticides.…
Science

[:es]Earliest South American migrants had Indigenous Australian, Melanesian ancestry[:]

In 2015, scientists discovered something surprising: that some Indigenous peoples in the Brazilian Amazon were distantly—but distinctly—related to native Australians and Melanesians. The genetic signal of Australasian ancestry in so far-flung a population sent researchers scrambling for answers. A new study reveals this genetic signal is more prevalent throughout South America than thought and suggests…
Science

[:es]Dark matter could warm the hearts of lonely old planets, scientists predict[:]

Dark matter might be raising the temperature of planets outside our Solar System, a pair of physicists predicts. Space telescopes already in the works should be able to spot the effect, they say, potentially enabling scientists to trace how the mysterious stuff is distributed within our Milky Way Galaxy.
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[:es]New generation of carbon dioxide traps could make carbon capture practical[:]

Windmills and solar panels are proliferating fast, but not fast enough to stave off the worst of climate change. Doing so, U.N. climate experts say, will also require capturing carbon dioxide (CO2) from the tens of thousands of fossil fuel power plants and industrial smokestacks likely to keep belching for years to come. Today’s most…
Science

[:es]Ultrasound reads monkey brains, opening new way to control machines with thought[:]

The most advanced mind-controlled devices being tested in humans rely on tiny wires inserted into the brain. Now researchers have paved the way for a less invasive option. They’ve used ultrasound imaging to predict a monkey’s intended eye or hand movements—information that could generate commands for a robotic arm or computer cursor. If the approach…
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[:es]Researchers re-create key human embryo stage in lab[:]

A human embryo at the blastocyst stage is smaller than the tip of a ballpoint pen and may contain fewer than 100 cells, but this developmental waypoint has long puzzled and vexed biologists and physicians. Many miscarriages occur during this stage, for example, and a blastocyst can also split to create twins. Now, multiple research…
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[:es]New Ebola outbreak likely sparked by a person infected 5 years ago[:]

An Ebola outbreak in Guinea that has so far sickened at least 18 people and killed nine has stirred difficult memories of the devastating epidemic that struck the West African country between 2013 and 2016, along with neighboring Liberia and Sierra Leone, leaving more than 11,000 people dead.
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[:es]‘Blinged out’ female ruler may be evidence of powerful women during Bronze Age[:]

As the many broken, battered bodies recovered from ancient burials can attest, the European Bronze Age was a tough time to be alive. Most historians and archaeologists have assumed these combative societies were led by men. But a new analysis of a richly adorned female ruler buried in a Bronze Age palace suggests women could…
Science

[:es]Ancient Earth was a water world[:]

Across the ages, sea levels have risen and fallen with temperatures—but Earth’s total surface water was always assumed to be constant. Now, evidence is mounting that some 3 billion to 4 billion years ago, the planet’s oceans held nearly twice as much water—enough to submerge today’s continents above the peak of Mount Everest. The flood…