Story archive
Browse SciQuest reporting and explainers in reverse chronological order, with the newest evidence-led stories first.
news Earth Evidence status: Peer reviewed · Mineral-proxy study
Sulfur in apatite sealed in zircons up to 3.42 billion years old suggests the mantle under early arcs grew more oxidized long before oxygen stayed in the air.
explainer Astronomy
How many moons does Venus have? None, and Mercury has none either. See NASA's moon counts for every planet and why the Sun and tides leave both moonless.
news Chemistry Evidence status: Peer reviewed · Laboratory materials study
Two niobium–titanium alloys showed no ductile-to-brittle transition at 20 K (−253 °C) in Nature lab tests. How twins make new defects, and what's unproven.
explainer Space
Gravity on Venus is 8.87 m/s², about 90% of Earth's. See the NASA values, the GM/R² calculation, what you would weigh, and why Venus is still deadly.
explainer Astronomy
How long does it take to get to each planet? From 94 days to Venus to 12 years for Neptune: real NASA and ESA mission times, Hohmann math and gravity…
news Biology Evidence status: Peer reviewed · Meta-analysis of published fossil records
A Nature Plants study of fossil pollen links most plant turnover of the past 120 million years to two hot spells. How it was done, and what it cannot show.
news Astronomy Evidence status: Peer reviewed · Observational study of one planet
JWST mapped hot Jupiter WASP-17b's atmosphere angle by angle: the evening edge is about 650 K hotter and puffier than the morning edge. How, and the catch.
news Anthropology Evidence status: Peer reviewed · Archaeological site study
Rock moulds at Spain's Abric Romaní preserve 13 wooden objects Neanderthals made or used, including a 2.45 m spear and a possible club. Here's what's uncertain.
explainer Physics
A click (klick) is military slang for one kilometre: 1,000 m, about 0.62 miles. See conversions, why 1 km Army map grids made it useful, and its origin.
