Showing 26 posts tagged swimming
An animal that can push with 40x their bodyweight, the hairy-tailed mole for example, is definitely something to better understand, and scientists at the University of Massachusetts and Brown University are trying to do just that. So how exactly do moles move so much dirt around as they tunnel underground?
From The New York Times’ ScienceTake: Uncovering the Secrets of Mole Motion.
"It might look kind of scary to a casual observer," (keeper Becca) Van Beek said. “She’ll grab Mo by the scruff of the neck and dunk him in the water. But that’s a very natural behavior. Baby otters are extremely buoyant, so Mo has built-in water wings for his swim lessons. This is how baby otters learn to swim, and it’s exactly what we’ve been hoping to see.”
In this extraordinary adaptation strategy, Thailand’s Moken sea gypsies can see twice as clearly underwater by controlling the size of their pupils. What was generally considered an automatic reflex for the rest of us is now thought to be something that any child under 5 could learn how to do.
From a study called Superior Underwater Vision in a Human Population of Sea Gypsies by Dr. Anna Gislén:
The Moken may learn to do this due to their extensive use of their eyes in water, where accommodation and concurrent pupil constriction is necessary for them to see the items they gather for food. It should then be possible for all humans to learn to see better underwater. But because sea gypsies have lived by and off the sea for thousands of years, evolution may also have favored those who had intrinsically better underwater accommodative powers. The ability to see well underwater could have become a genetic trait. Another possible explanation is that accommodation underwater is a side effect of the diving response; the parasympathetic nerves that control this reflex also control pupil constriction.
In Onward: Searching for Life in Iceland’s Frigid Fissures, National Geographic grantee and biology researcher Jónína Ólafsdóttir goes diving in search of tiny arthropods in the underwater volcanic fissures of Iceland’s Thingvellir National Park. She is joined by NatGeo multimedia journalists Spencer Millsap and Dan Stone.
“When I started doing this research, I was amazed that no one had ever done it before,” she said one morning earlier this week as we drove to her favorite dive site. Iceland has a lot of research questions related to biology and geology that have never been answered, let alone even asked. “Iceland is a really great place for a scientist with an explorer’s heart,” she says…
Ecologists are often asked why they might study one particular animal, especially a small one that has little impact on humans. Jónína’s answer goes like this: humanity might never be dependent on microscopic arthropods but understanding how animals work together, how they depend on each other holds lots more clues about an area’s environmental history—and its future. At the top of the world, seeing how species change and adapt may indicate what happens as the climate changes around the world.