Hundreds of punctured shells from the Cambrian illuminate unique predator-prey interactions in the ocean 517 million years ago A new study led by researchers at the American Museum of Natural History presents the oldest known example in the fossil record of an evolutionary arms race. These 517-million-year-old predator-prey interactions occurred in the ocean covering what...
From its headwaters in Brazil, the Paraguay River flows hundreds of miles (kilometers) south to where it joins the Parana River to form a single 2,100-mile (3,400-kilometer) waterway that carries much of the agricultural and mineral wealth of South America to the Atlantic. The riverine waterway connects Argentina, Bolivia, Brazil, Paraguay and Uruguay and carries...
As it passed above the Niger Delta in 2021, a satellite took an image. It showed acres of land, scraped bare. The site, outside the city of Port Harcourt, was on a cleanup list kept by the United Nations Environment Programme, supposed to be restored to green farmland as the Delta was before thousands of...
The pace at which anthropogenic climate change has altered the terrestrial carbon stores is making our current climate-change mitigation efforts seem fruitless, unless behaviors are quickly changed. Climate change induced by human behaviors, or anthropogenic climate change, has been a hot topic for decades and is not going away. As with any problem, reviewing datasets...
There were no antebellum hoop skirts at the site of Brazil’s annual “Festa Confederada,” or Confederate Festival, in 2024. Flag poles that once flew the Brazilian flag alongside the red, white and blue rebel banner of the American Confederacy stood barren. Since 1980, the Confederate Festival – a series of cultural performances and culinary experiences...
Police investigating the shooting of UnitedHealthcare CEO Brian Thompson on Dec. 4, 2024, have announced that the suspected assailant had used a 3D-printed gun. Several high-profile crimes in recent years have involved this kind of homemade, or partially homemade, weapon. Often called “ghost guns” because they can be hard to trace, these firearms can be...
The U.S. looks set to have its first-ever Cuban American secretary of state in 2025, after President-elect Donald Trump nominated U.S. Sen. Marco Rubio of Florida for the role. But don’t expect that to mean cozier relations between Havana and Washington. Rubio, who if confirmed by the Senate will also be the first Latino to...
Dressed in a faded pink dress, 6-year-old Juliet Samaniya squats under scorching skies to chip at a jagged white rock with a stone tool. Dust coats her tiny hands and her hair as she works hour after hour for less than a dollar a day. The landscape around her is dotted with active and abandoned...
“Dog is man’s best friend” may be an ancient cliché, but when that friendship began is a longstanding question among scientists. A new study led by a University of Arizona researcher is one step closer to an answer on how Indigenous people in the Americas interacted with early dogs and wolves. The study, published today in the...
Scientists have uncovered the first direct evidence that ancient Americans relied primarily on mammoth and other large animals for food. Their research sheds new light on both the rapid expansion of humans throughout the Americas and the extinction of large ice age mammals. The study, featured on the Dec. 4 cover of the journal Science Advances,...
