By Science News | Susan Milius | 5/30/2025 12:00 PM
Warm temperatures, not just predator pressure, may favor luna moths’ long bat-fooling streamers, a geographic analysis of iNaturalist pics shows. ... Read full Story
By Science News | Tom Metcalfe | 5/29/2025 9:00 AM
A new genetic study could help saolas survive by enabling better searches through environmental DNA. But some experts fear they may be extinct already. ... Read full Story
By Science News | Jake Buehler | 5/27/2025 7:01 PM
Common bedbugs experienced a dramatic jump in population size about 13,000 years ago, around the time humans congregated in the first cities. ... Read full Story
Penguin poop provides ammonia for cloud formation in coastal Antarctica, potentially helping to mitigate the impacts of climate change in the region. ... Read full Story
By Science News | Freda Kreier | 5/19/2025 11:00 AM
Over 15 months on Jicarón Island, researchers saw five capuchin juveniles abduct 11 endangered howler monkey infants — all for no clear purpose. ... Read full Story
The Salmon Cannon and the Levitating Frog contends that curiosity-driven research helps us understand the world and could lead to unexpected benefits. ... Read full Story
Analyses unveiled never-before-seen feathers and bones from the first known bird, strengthening the case that Archaeopteryx could fly. ... Read full Story
A study in Uganda shows how often chimps use medicinal plants and other forms of health care — and what that says about the roots of human medicine. ... Read full Story
Chimpanzees combine hoots, calls and grunts to convey far more concepts than with single sounds alone. It may be a first among nonhuman animals. ... Read full Story
The porpoise is critically endangered. Ancient Chinese poems reveal the animal’s range has dropped about 65 percent over the past 1,400 years. ... Read full Story
By Science News | Meghan Rosen | 5/2/2025 11:00 AM
A new antivenom relies on antibodies from the blood of Tim Friede, who immunized himself against snakebites by injecting increasing doses of venom into his body. ... Read full Story
Sunflower sea stars discovered taking refuge in fjords may offer clues to saving the critically endangered species from sea star wasting disease. ... Read full Story
Easy replication in cattle mammary glands means H5N1 bird flu is under no evolutionary pressure to adapt to spread easily in humans. ... Read full Story
Dubbed the “bone collector,” this caterpillar found on a Hawaiian island disguises itself while stalking spider webs for trapped insects to eat. ... Read full Story
Merriam-Webster's Word of the Day for August 2, 2025 is:
palimpsest \PAL-imp-sest\ noun
Palimpsest in its original use refers to writing material (such as a parchment manuscript) used one or more times after earlier writing has been erased; the underlying text is said to be “in palimpsest.” Palimpsest in extended use refers to something that has usually diverse layers or aspects apparent beneath the surface.
// Scholars believe the motive for making palimpsests was often economic—reusing parchment was cheaper than preparing a new skin.
// The ancient city is an architectural palimpsest.
“My aim was to trace the course of … the Aqua Marcia, built between 144 and 140 B.C. by Julius Caesar’s ancestor Quintus Marcius Rex. … The original tuff arches carried the Marcia across a steep ravine. Subsequent retaining walls and buttresses have transformed the bridge into a palimpsest of building styles.” — David Laskin, The New York Times, 24 Apr. 2024
Did you know?
Long ago, writing surfaces were so highly valued that they were often used more than once. Palimpsest in its original use referred to an early form of recycling in which an old document was erased to make room for a new one when parchment ran short. (The word is from the Greek palimpsēstos, meaning “scraped again.”) Fortunately for modern scholars, the erasing process wasn’t completely effective, so the original could often be distinguished under the newer writing. De republica, by Roman statesman and orator Cicero, is one of many documents recovered from a palimpsest. Nowadays, the word palimpsest can refer not only to such a document but to anything that has multiple layers apparent beneath the surface.