No sterile neutrinos after all, say MicroBooNE physicists

There’s a less than 5 percent chance that earlier anomalies can be explained by fourth neutrino “flavor.” Since the 1990s, physicists have pondered the tantalizing possibility of an exotic fourth type of neutrino, dubbed the “sterile” neutrino, that doesn’t interact with regular matter at all, apart from its fellow…

This is the oldest evidence of people starting fires

We didn’t start the fire. (Neanderthals did, at least 400,000 years ago.) Heat-reddened clay, fire-cracked stone, and fragments of pyrite mark where Neanderthals gathered around a campfire 400,000 years ago in what’s now Suffolk, England. Based on chemical analysis of the sediment at the site, along with the telltale…

Brazil weakens Amazon protections days after COP30

Backed by powerful corporations, nations are giving public false choices: Environmental protection or economic growth. Despite claims of environmental leadership and promises to preserve the Amazon rainforest ahead of COP30, Brazil is stripping away protections for the region’s vital ecosystems faster than workers dismantled the tents that housed the…

Pompeii construction site confirms recipe for Roman concrete

Latest results from a recently discovered ancient Roman construction site confirm earlier findings. Back in 2023, we reported on MIT scientists’ conclusion that the ancient Romans employed “hot mixing” with quicklime, among other strategies, to make their famous concrete, giving the material self-healing functionality. The only snag was that…

A massive, Chinese-backed port could push the Amazon Rainforest over the edge

The port will revolutionize global trade, but it’s sparking destructive rainforest routes. CHANCAY, Peru—The elevator doors leading to the fifth-floor control center open like stage curtains onto a theater-sized screen. This “Operations Productivity Dashboard” instantaneously displays a battery of data: vehicle locations, shipping times, entry times, loading data, unloading…

Rare set of varied factors triggered Black Death

Volcanic eruptions in the mid-1340s triggered a chain of events that brought the Black Death to Europe. The Black Death ravaged medieval Western Europe, ultimately wiping out roughly one-third of the population. Scientists have identified the bacterium responsible and its likely origins, but certain specifics of how and why…