Once every synodic month, the Sun, Moon and Earth move into a geometry that puts Earth inside the Moon’s downstream sodium stream. Neutral atoms released from lunar soil have been accelerated away ...
Fine filaments and root hairs in topsoil. Arbuscular mycorrhizal hyphae themselves are far thinner — 10 to 50 times narrower than a human hair. It would also stretch a little over a tenth of the way ...
Not many charts get famous. Stock tickers don’t count, and neither does the pie chart from a meeting nobody remembers a week later. But there’s one jagged, climbing line that keeps turning up ...
Artist's concept showing how accretion may change as pulsar GX 301−2 crosses a dense plasma stream from Wray 977. Left: a turbulent disk forms. Centre: the disk breaks apart and plasma flows directly ...
A clay tablet and the envelope it was sealed in, from the Old Assyrian period, shown separately on a museum mount. The letter described in this article has never been taken out of its envelope. Photo ...
For a few years in the early 1990s, a lot of New York streets sparkled. Picture a Manhattan avenue at dusk, wet from a passing shower, the streetlights and headlights catching something in the road ...
Near the base of the Dallol hydrothermal field in Ethiopia’s Afar region sits a pond barely 60 meters long, its water tinted pale yellow by dissolved iron. Chemists who sampled it found a total ...
A collision powerful enough to break an icy moon into a cloud of debris appears, at first glance, to be an efficient way to make an ocean. The impact converts motion into heat. Gravity pulls the ...
Giant sunspot on the solar disk imaged by NASA's Solar Dynamics Observatory on 24 October 2014 — thematic full-disk sunspot imagery. Credit: NASA/SDO, public domain. That number matters because of ...
Sisters Islands, Singapore. Photo: Stefan Fussan / Wikimedia Commons / CC BY-SA 4.0 Eight structures went down on bare sand in 2018. Four years later, the two that nobody planted anything on were ...
Two and a bit tonnes of snapped rock, stacked into neat circles, in a chamber that has never once seen daylight. Nobody has worked out why. Bruniquel Cave sits above the Aveyron gorges in the ...
Minamata Bay, 1974. Made based on National Land Image Information (Color Aerial Photographs), Ministry of Land, Infrastructure, Transport and Tourism. Stand on the eastern shore of Minamata Bay today ...
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