Science

Yes. Bryophytes are nonvascular land plants — mosses, liverworts, and hornworts — with more than 25,000 species, according to OpenStax Biology.

African wild dogs are classified as Endangered, with a declining population affected by habitat fragmentation, conflict and disease.

Yes. On September 17, 2026, researchers writing in Current Biology formally described Leopardus tilcayo, a small spotted tiger cat from Bolivia’s Yungas cloud forests—the first newly named living cat species in more than a century (since the Uruguayan pampas cat in 1923). Whole-genome analysis of 38 Leopardus samples showed the animals long lumped as “tiger … Read more

No. All living birds are endothermic—commonly called “warm-blooded”—meaning they generate and regulate body heat internally rather than relying mainly on the environment the way reptiles and amphibians do. Some birds do temporarily lower metabolism and body temperature in a controlled state called torpor (seen in hummingbirds, swifts, nightjars, and others), which can look “cold,” but … Read more

JWST occultation data show Chariklo’s inner ring grew denser while its outer ring nearly vanished, pointing to real ring evolution around the small centaur.

Question Are accessory muscles used? Answer Yes. During increased breathing effort, people can recruit accessory respiratory muscles such as the sternocleidomastoids, scalenes, and intercostals; quiet breathing normally relies mainly on the diaphragm and intercostal muscles. Visible accessory-muscle use is a sign of respiratory difficulty and should be considered alongside signs such as rapid breathing, cyanosis, … Read more

Yes. At a September 18, 2026 demonstration at the University of Utah’s Center for Medical Innovation, amputee Avi Davidson used the “LUKE Arm,” a neuroprosthesis that translates signals from an implant in the nerves and muscles of his residual upper arm into robotic hand movements and returns a sense of touch. Davidson is the ninth … Read more

Yes. In a Nature Neuroscience study published September 14, 2026, University of California, San Francisco researchers led by Samantha C. Brosler and Edward F. Chang showed that a single high-density electrocorticography (ECoG) implant can decode attempted speech and upper-body gestures simultaneously in people with paralysis. Two BRAVO-trial participants controlled a personalized virtual avatar that produced … Read more

No. Prisms are polyhedra with two parallel identical bases, but polyhedra also include pyramids, tetrahedra, and many other shapes that are not prisms.

Yes, in a randomized trial — for many participants, and for some much longer. In the RIO trial (Imperial College London, University of Oxford, and Rockefeller University), 68 men living with HIV received either two long-acting broadly neutralizing antibodies (bNAbs) — 3BNC117-LS and 10-1074-LS — or a placebo, then paused daily antiretroviral therapy (ART) under … Read more