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#biology

33 posts33 participants1 post today

Our fingers wrinkle in water due to a loss of blood flow our nervous system causes, and (they think) this is because evolution-wise, this would've allowed early humans to grip things better when their hands were wet (fish, tools, etc). 🤯

popsci.com/science/why-do-fing

Popular Science · Why do our fingers wrinkle in water? It's much deeper than skin.A study of polio patients almost 90 years ago gave scientists their first big clue.

Imo the only relevant #species definition for #deextintion is the ecological one. In other contexts this definition is absolutely silly, because it can't distinguish between a #bat and a #bird if they hunt #insects - it defines a species by their ecological #niche.

Under that definition, an elephant with hair is in fact a #mammoth because it's can live in tundra and serve as an umbrella species capable of shaping an entire #ecosystem, serving a unique role in it.

A #dire #wolf is not actually deextinct if it's not serving the ecosystem the way the OG dire wolf used to.
#biology #climate

Measuring Mucus by Dragging Dead Fish

A fish‘s mucus layer is critical; it protects from pathogens, reduces drag in the water, and, in some cases, protects against predators. But little is known about how mucus could affect terrestrial locomotion in species like the northern snakehead, which can breathe out of the water and move across land. So researchers explored the snakehead’s mucus layer by measuring the force required to drag them (and two other non-terrestrial species) across different surfaces.

The team tested the same, freshly euthanized fish twice: once with its mucus layer intact and again once the mucus was washed off. Unsurprisingly, the fish’s friction was much lower with its mucus. But they also found that the snakehead was slipperier than either the scaled carp or the scale-free catfish. The biologists suggest that the snakehead could have evolved a slipperier mucus to help it move more easily on land, thereby extending the distance it can cover.

As a fluid dynamicist, I think fish mucus sounds like a great new playground for the rheologists among us. (Image and research credit: F. Lopez-Chilel and N. Bressman; via PopSci)

For #academia #biology

I started a part-time job at NYMC sequencing core past Oct. PI here (Ravi Sachidanandam) didn't pay me until late Jan, and is now arguing I shouldn't be paid for earlier period since I wasn't present full-time.

And now it looks like 'official' job contract only covers work from late November onward and he was just lying about backpay.

I don't even care about the money - but I would like to get a warning out there about this lab. What would be a good way for this?

"Our research identifies specific steps in embryogenesis that contribute to spina bifida," said senior study author Dr. Joseph Gleeson, a professor at Rady Children's Institute for Genomic Medicine and the University of California, San Diego. "This is a major step forward in understanding why this condition occurs and how we might one day prevent it."

#genetics #research #science #biology #SpinaBifida

labroots.com/trending/cell-and

LabrootsNew Insights Into the Causes of Spina Bifida | Cell And Molecular BiologyWhen the spine or spinal cord do not form properly, a disorder called spina bifida arises... | Cell And Molecular Biology