Consonance and dissonance have no meaning to monkeys, studies have shown. Nature Science Update reported on experiments on cotton-top tamarins showing that, unlike humans, they do not find consonant tones more pleasing than dissonant ones. “If you want to look at the evolution of music it’s important to do these types of studies,” says Laurel […]
Elementary physical science students know how airplane wings generate lift, but bird flight poses special challenges. The aptly-named swifts, for instance, can practically turn on a dime, dive steeply, and halt in mid-air to catch insects in ways that make a stunt pilot stall. It’s not just flapping, and it’s not just leading-edge feather shape, […]
Scientists have noticed that crows have some of the same tool-making skills as apes, and in fact, are even better tool makers. How could such vastly different animals show such similar mental skills? Science1 explains this as another example of convergent evolution: Discussions of the evolution of intelligence have focused on monkeys and apes because […]
“Human gland evolved from gills” trumpeted a BBC News science article without apology.* It gives uncontested press to a team from King’s College that is claiming the human parathyroid glands evolved from gills. This is claimed on the basis that they have similar functions (calcium regulation) and are located in the neck region. Fish have […]
The duck-billed platypus has thrown another curveball at evolutionary theory. Long puzzling to phylogenists for its mosaic of features that make it seem part mammal, bird and reptile, it has now revealed a genome with 10 sex chromosomes – 10 X in the female, and 5 X plus 5 Y in the male. Moreover, the […]
A worm brain has photoreceptors similar to those in humans. What does it mean? Elizabeth Pennisi in Science1 sets the stage, commenting on work by Arendt et al. in the same issue,2 “Ciliary Photoreceptors with a Vertebrate-Type Opsin in an Invertebrate Brain.” One might think this demonstrates common ancestry, but Pennisi explains that it’s not […]
Your brain is 100% occupied when watching and concentrating on things, and still processing at 80% in the dark when idle, say researchers at University of Rochester. Opening your eyes only adds 20% more brain activity to the 80% while in neutral. The amount of neural processing going on in idle mode surprised the researchers. […]
A shorebird named the black-tailed godwit presents a puzzle to biologists: “arrival synchrony” (leave it to scientists to give big names to simple concepts). The males and females of this bird mate for life, but like some humans, live apart for months at a time. This presents two puzzles: how do they stay apart without […]
National Geographic News wasted no time; a day before a report of another Chinese dinosaur with feathery-like structures was published in Nature,1 they already had color artwork on their news page, trumpeting the title, “T. Rex Cousin Had Feathers.” Yet Nature itself seemed ho-hum about the announcement. It was neither the cover story, nor mentioned […]
Every pupil knows that pupils constrict in bright light and dilate in dim light, but how? Physiologists had assumed the retina signalled the iris muscles, but now it appears there is an independent mechanism in the iris itself, at least in birds, and probably in mammals, too. A report in EurekAlert summarizes a finding from […]
When Young and Brodie & son published their article “How the Horned Lizard Got its Horns,” (see 04/01/2004 headline), they apparently meant it as a bit of April-fool joke, not a real Kipling-style just-so story. Several respondents in the Sept 24 issue of Science,1 however, either didn’t think it was funny or concluded the story […]
Termites, despite their bad rap, have something to teach human homebuilders. Their mounds are self-sufficient, air-conditioned, environmentally friendly and cheap to run, according to a story in EurekAlert. “The mounds incorporate a complicated network of tunnels and air conduits designed to channel air flow for the control of internal air quality, temperature and moisture levels.” […]
Every kitchen needs one, says National Geographic News: a popular new device that turns garbage into fertilizer. What is it? A new high-tech electronic machine? No, something more ancient: a worm bin. Modern homes are finding old benefits in vermiculture, the art of composting garbage into plant food via worms and bacteria. A small bin […]