Scientific Discoveries

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When Einstein's gravitational waves meet Newton's tides
Science News

When Einstein's gravitational waves meet Newton's tides

Newton's theory of gravity has described the tides accurately for centuries. But could a tiny trace of Einstein's general relativity also be hidden in them? In a new study, a mathematician at Freie Universität Berlin has outlined how a targeted approach could be used to search for effects of this nature.

📅 2026-11-05 15:40:18    •    Phys.org
NASA's Swift telescope has burned up, months after a robot sent to save it failed
Science News

NASA's Swift telescope has burned up, months after a robot sent to save it failed

NASA's Neil Gehrels Swift Observatory took its last look at the sky on Oct. 20, 2026, while orbiting about 171 miles (275 kilometers) above Earth. NASA ended the telescope's mission three days later, because Swift had sunk so low that drag from the thin air there meant its telescopes couldn't hold steady.

📅 2026-11-05 15:40:14    •    Phys.org
Earth's slowing spin may have shaped its primordial crust
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Earth's slowing spin may have shaped its primordial crust

Around 4.5 billion years ago, a planet-sized object collided with the newly formed Earth, throwing out the debris that would later form the moon. The collision left Earth spinning extremely fast, with days lasting just two to five hours. Yet existing models of how Earth's first crust formed and evolved have largely overlooked how the planet's later slowdown might have affected it.

📅 2026-11-05 15:20:06    •    Phys.org
Coordinated activity gives large pedestrian crowds a distinctive seismic signature
Science News

Coordinated activity gives large pedestrian crowds a distinctive seismic signature

Large pedestrian crowds generate distinctive seismic signals depending on their collective behavior, according to a new study that includes data from Tokyo schools and outdoor gatherings in the United States and Israel. These seismic signals are strongest in the 1–2 hertz frequency band, which is consistent with human walking frequencies.

📅 2026-11-05 15:00:12    •    Phys.org
Young children like sharks, but fear grows with age
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Young children like sharks, but fear grows with age

Most young children like sharks, with almost seven in 10 describing them in a positive light, but a new study has found that associations between sharks and fear become more common as children get older.

📅 2026-11-05 14:50:02    •    Phys.org
Which infinity is bigger? Under alternative mathematical rules, a 2D map emerges
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Which infinity is bigger? Under alternative mathematical rules, a 2D map emerges

It is one of the great questions of mathematics: What does "infinity" actually mean? Which infinities are larger than others? Can infinities be arranged in a sequence, like the rungs of an endless ladder, so that for any two of them we can always say which one lies above the other?

📅 2026-11-05 14:40:08    •    Phys.org
New statistical method eliminates AI estimation bias in econometrics
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New statistical method eliminates AI estimation bias in econometrics

A new research paper describes a statistical framework that resolves significant calculation biases caused by artificial intelligence in econometric models. The method, two-step extraction, removes estimation bias when researchers measure the business or economic effects of variables extracted using machine learning algorithms from unstructured data such as photos and consumer text.

📅 2026-11-05 14:30:01    •    Phys.org