Abstract: Permutation entropy (PE) is a widely used metric for quantifying the complexity of time series data. Recent efforts have extended PE to graph signals, resulting in the graph permutation ...

Gravity may seem constant, but it actually varies across the planet—and one of the strangest places is Antarctica, where gravity is slightly weaker than expected. Scientists have traced this “gravity ...

"We are really pushing the edges, and are seeing things that are more massive, spinning faster, and are more astrophysically ...

Everything depends on what people and their government do,” Somerville writes, not once, not twice, but (if I count correctly) seven times.

Heightened exposure to pollutants like ozone and particulate matter during the 2023 Canadian wildfires was associated with both heightened risk of stroke and more severe strokes, according to a study ...

Harvard University researcher Michael McElroy made groundbreaking contributions to climate science and helped shape global ...

Trump's remarks on Saturday casting doubt on the global scientific consensus about harmful gases were met with silence ...

After a Falcon 9 rocket stage burned up in the atmosphere, vaporised lithium and other metals drifted over Europe. This growing type of pollution could destroy ozone and form climate-warming clouds ...

PEBBLE BEACH, Calif. — Collin Morikawa dreamt about his winning moment. He spent months visualizing it. On a mid-week call with his mental coach, Rick Sessinghaus, he refocused on it. After a Saturday ...

A massive star 2.5 million light-years away simply vanished — and astronomers now know why. Instead of exploding in a supernova, it quietly collapsed into a black hole, shedding its outer layers in a ...