By Science News | Jake Buehler | 12/16/2025 9:00 AM
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By Science News | Payal Dhar | 12/12/2025 11:00 AM
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By Science News | Jake Buehler | 12/8/2025 3:00 PM
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The modern house cat reached China in the 8th century. Before that, another cat — the leopard cat — hunted the rodents in ancient Chinese settlements. ... Read full Story
By Science News | Jake Buehler | 11/25/2025 12:00 PM
Ancient collagen preserved in the bones of extinct Australian mammals is revealing their evolutionary relationships, leading to some surprises. ... Read full Story
By Science News | Maria Temming | 11/21/2025 8:00 AM
Simple chemistry could give the reindeer his famously bright snout. But physics would make it look different colors from the ground. ... Read full Story
By Science News | Elie Dolgin | 11/20/2025 7:01 PM
A machine learning analysis of wild lion audio reveals they have two roar types, not one. This insight might help detect where lions are declining. ... Read full Story
By Science News | Elie Dolgin | 11/17/2025 12:00 PM
Video from the Haíɫzaqv Nation Indigenous community shows a wolf hauling a crab trap ashore. Scientists are split on whether it counts as tool use. ... Read full Story
Newly mated parasitic queen ants invade colonies and spray their victims with a chemical irritant that provokes the workers to kill their mother. ... Read full Story
By Science News | Meghan Rosen | 11/14/2025 11:00 AM
Ancient RNA from Yuka, a 40,000-year-old woolly mammoth preserved in permafrost, can offer new biological insights into the Ice Age animal’s life. ... Read full Story
An analysis of mining plumes in the Pacific Ocean reveals they kick up particles sized similarly to the more nutritious tidbits that plankton eat. ... Read full Story
After a decades-long hiatus, new world screwworm populations have surged in Central America and Mexico — and are inching northward. ... Read full Story
Merriam-Webster's Word of the Day for March 19, 2026 is:
nadir \NAY-deer\ noun
Nadir refers to the lowest or worst point of something. When used in astronomy, nadir describes the point of the celestial sphere that is directly opposite the zenith and vertically downward from the observer.
// Only once the novel’s protagonist reaches her nadir does she arouse the reader’s empathy, and we root for her to climb back to respectability.
“Sacrament dives right into the nadir of the 2020 health crisis, following a group of nurses who have moved into makeshift housing near a California hospital, to isolate from their families during the height of the case surge.” — James Folta, LitHub.com, 1 July 2025
Did you know?
Nadir is part of the galaxy of scientific words that have come to us from Arabic, a language that has made important contributions to the English lexicon especially in the fields of mathematics, astronomy, medicine, and chemistry. The source of nadir is naḍhīr, meaning “opposite”—the opposite, that is, of the zenith, the highest point of the celestial sphere which is positioned vertically above the observer. (The word zenith itself is a modification of another Arabic word that means “the way over one’s head.”) Though born of the heavens, both words are called upon to refer to earthy things too, especially a significant point or period of time, be it a high point or low one.