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news Earth Evidence status: Peer reviewed · Global observational analysis of satellite-derived datasets
Glaciers ending in lakes, oceans or ice shelves are 3.2% of the world's glaciers but lost 134 Gt of ice a year in 2000–2019, just over half of all glacier…
news Earth Evidence status: Peer reviewed · Laboratory shock experiments
Laser shocks put magnesium oxide's complete melting at 572 GPa and 13,200 K, and crystal direction changed when it transformed. What it means for planets.
explainer Astronomy
Why is the Moon orange tonight? Near the horizon its light crosses about 38 times more air, stripping out blue. See the maths, smoke's role and eclipse signs.
news Earth Evidence status: Peer reviewed (accelerated preview) · Data compilation plus modelling
Across 32 kimberlites, most diamond-rich pipes held olivine with over 40 ppm water. A new study ties this to faster-rising magma, but the exceptions matter.
news Anthropology Evidence status: Peer reviewed (accepted manuscript) · One marine sediment core
A 500,000-year Indian Ocean dust record dates ten Green Arabia wet phases and brief ice-age rains, and models about 11 times more hominins in green times.
news Earth Evidence status: Peer reviewed (accepted manuscript); one rock section plus a regional fossil compilation; statistical association
Rocks near Beijing date the Cambrian SPICE event to about 2.2 million years and show sea-level swings ran roughly 70,000 years ahead of seafloor species losses.
explainer Physics
Count seconds from flash to thunder and divide by 3 for km (5 for miles). Why it works, a worked example, and why any thunder means go indoors.
explainer Earth
How deep is the ocean? About 3,682 m (12,080 ft, 2.3 mi) on average and 10,935 m (6.8 mi) at the Challenger Deep. Depth by ocean and why sources differ.
explainer Earth
Sound travels about 343 m/s (768 mph, 1,236 km/h) in 20 °C air. See the formula, a temperature table, water and steel speeds, altitude and Mach 1.
