Hidden Crotch Detail Solves a 500-Year-Old Leonardo Da Vinci Mystery

Leonardo da Vinci, the famous Italian polymath who painted the Mona Lisa, had a sophisticated geometric understanding far ahead of his time.

ScienceAlert

🐳💧 #Whales and #seals live in a #saltwater #environment where drinking the #ocean would be dangerous. These marine #mammals stay hydrated through a mix of high-efficiency kidneys and a biological process that turns the fat in their food into fresh #water.

👉 https://www.popsci.com/environment/how-do-sea-mammals-stay-hydrated/

#biology #science #nature #physiology #wildlife #ecology

How marine mammals stay hydrated in a salty sea

From chomping down on water-rich prey to very salty pee.

Popular Science
Up to 1.5 litres of gastric juice containing hydrochloric acid is secreted inside the stomach per day. This fluid, has a pH of 0.9 to 1.5, initiates protein digestion and kills pathogens, with secretion stimulated by food. #Biology

Spring is in the air, it is on the ground, and it is showing up on winter deciduous trees.

This cluster shows a still leafless Himalayan Birch (Betula alnoides) full of yellow catkins, the other taller trees are Himalayan Alder (Alnus nepalensis) which have new leaves & leaf buds. The dark evergreen trees are Tree Rhododendron (Rhododendron arboreum).

#trees #nature #spring #Hinalayas #IndiasNature #HimalayaSpeaks #HimalayanBirch #Alder #Rhododendron #Phenology #catkins #biology #ecology

Thunderstorms Make Trees Glow

Scientists have long hypothesized that the high electrical charge of thunderstorms could produce an opposite charge in the ground that would discharge from the forest canopy. But this phenomenon, known as a corona, had never been observed on actual trees. A new study, however, has observed this ghostly ultraviolet (UV) glow from the tips of sweetgum leaves and loblolly pine needles during thunderstorms.

Catching these coronae in action required a new kind of UV detector that was ultra-sensitive to the particular band of UV-light emitted by coronas, hot fires, or mercury lamps. Since the latter two weren’t present during the team’s field observations, they were able to conclude that the light they detected came from coronae.

The group observed that corona discharges were transient, jumping from leaf to leaf and branch to branch across the forest canopy. For any creature capable of detecting that glow by eye, it must be incredible to watch the treetops lit by their own ever-shifting auroras during every thunderstorm. (Image credit: W. Brune; research credit: P. McFarland et al.; via SciAm)

#biology #corona #electrohydrodynamics #flowVisualization #fluidDynamics #physics #plasma #science #thunderstorms

Coyote pupping season is here. You can help keep them safe.

https://fed.brid.gy/r/https://www.popsci.com/environment/coyote-pup-season-spring/

Never mind Band-Aids, Neanderthals had antiseptic birch tar

Our view of Neanderthal life keeps getting more complex and vibrant.

Ars Technica

Oh wow! Potentially crucial technical breakthrough for #cryopreservation! Individuals were frozen, placed in liquid nitrogen and then successfully revived 12 months later!

Obviously, that was done in #drosophila - what did you think? 😆

Benjamin de Bivort @debivort from Harvard is the senior author of this important work:

"Permeabilization with fenchone enhances cryopreservation of Drosophila embryos"

https://royalsocietypublishing.org/rsbl/article/22/3/20250808/480954/Permeabilization-with-fenchone-enhances

#science #biology

Permeabilization with fenchone enhances cryopreservation of Drosophila embryos

Abstract. The difficulty of cryopreservation has long been a limitation of Drosophila melanogaster as a genetic model organism. Here, we report a statistic

The Royal Society

🧠🗺️ We navigate our world using a complex internal map powered by specialized cells that act like a biological coordinate system.

Research on #London taxi drivers proves that as we memorize new routes and #landmarks, the navigation center of our #brain actually expands.

👉 https://discoverwildscience.com/the-brains-hidden-maps-how-we-navigate-our-complex-world-1-393468/

#neuroscience #biology #science #learning #maps #psychology #education #nature

The Brain's Hidden Maps: How We Navigate Our Complex World - discoverwildscience

KristinaYou do it every single day without thinking twice. You walk to the kitchen, drive to work, wander through a grocery store, and somehow always find your way back home. It feels effortless, almost automatic. Yet what’s happening inside your skull during all of that is breathtakingly complex, a symphony of neurons firing in patterns ... Read more

discoverwildscience