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This beautiful cat has sectoral heterochromia, where the iris contains two different colours due to a lack or excess of melanin. 😻😻😻 Complete heterochromia occurs when one iris a totally different colour from the other. It’s most prevalent in cats and dogs, but about 1% of the human population has it too. 📷: raoeang/Imgur #cat #instacute #science #sciencealert http://ift.tt/2gMfW5Y

Though it’s only 2.8-4.3 inches wide, the terrestrial crab Johngarthia lagostoma is the largest native land animal on Ascension Island, one of four islands in the South Atlantic where it’s found. Since these crustaceans cannot swim, the method by which they arrived on an isolated island like Ascension remains unknown–though some speculate that smaller islands, now underwater, could have helped these crabs arrive at their current homes. Species introduced by Europeans in the 19th century, include mice, rats, and rabbits, now compete with these endemic land crabs.

On Ascension–a volcanic island–most of the crabs are yellow-orange, but some are dark purple, which may help them hide from predators. Their larvae are marine, and adults migrate to the water in the rainy season to release their offspring, with mating taking place along the way. During this time, as the crabs travel from their range in the mountains to the sea, they can cover roughly 1,480 ft per day.

Give thanks.

Playing with pens at @fahrneyspens this weekend. Some @aurorapens & @rickshawbags for the #edc this weekend. 🖋🌟✒️🖋🌟✒️🖋🌟✒️🖋🌟✒️ #fountainpenday #dc #writing #ink #pen #saturday #fun #optima #rickshaw (at Fahrney’s Pens)

The frog leap was captured on camera.

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Dinosaur tail trapped in amber sheds light on evolution of feathers

Amber is often prized not just for its golden beauty, but also for the tiny creatures it contains, many of them millions of years old. Now, a chunk of this fossilized tree sap found at a market in Myanmar has turned out to contain a very rare treasure indeed: a slender piece of feathered tail that belonged to a small bipedal dinosaur that lived about 99 million years ago.

“Since Jurassic Park came out, paleontologists have joked about finding dinosaurs in amber, since it would contain so much extra information. And now we have a piece of one,” says Thomas Holtz, a vertebrate paleontologist at the University of Maryland in College Park who was not involved in the study.

Researchers aren’t using ancient blood from the belly of preserved mosquitos to recreate dinosaurs, as in the movies. But the finding does reveal a feathered dinosaur tail in 3D for the first time, and offers a unique glimpse into the early evolution of feathers. Amber is a uniquely useful fossilizer, notes Michael Engel, a paleontologist and entomologist at the University of Kansas in Lawrence who was also not involved in the study. “It preserves things in lifelike fidelity.” Although it’s rare to find larger animals preserved in the sticky flow, researchers have found everything from frogs to lizards to ancient bird wings, likely entombed after death.

The Diving Bell Spider is the only known spider that lives 100% of its life underwater. The silk it makes is waterproof, allowing it to drag air bubbles from the surface into ‘bells’ it creates between leaves of water plants. The silk allows CO2 to escape and oxygen to enter the ‘bell’ from the surrounding water. It preys on shrimp, aquatic insects, etc. To mate, two spiders expand their ‘bells’ to connect the male builds a tunnel of air between his pocket and a females. (Source)