Moths have evolved thick 'stealth coats' to stop hungry bats from hearing them fly, claims scientist

Moths have evolved thick 'stealth coats' to stop hungry bats from hearing them fly, one scientist has claimed. 

Moths are a mainstay food source for bats which use biological sonar to hunt their prey, according to Daily Mail.

While some moths have evolved ears that detect the ultrasonic calls of bats, many types of moths remain deaf.

Thomas Neil from Bristol University found the insects have developed what he calls a 'stealth coating' that serves as an acoustic cover.

Dr Neil says moths have evolved passive defences over millions of years to resist their primary predators.

Dinosaurs put all colored birds' eggs in one basket, evolutionarily speaking

A new study says the colors found in modern birds' eggs did not evolve independently, as previously thought, but evolved instead from dinosaurs.

According to researchers at Yale , birds inherited their egg color from non-avian dinosaur ancestors that laid eggs in fully or partially open nests. according to Science Daily.

"This completely changes our understanding of how egg colors evolved," said the study's lead author, Yale paleontologist Jasmina Wiemann. "For two centuries, ornithologists assumed that egg color appeared in modern birds' eggs multiple times, independently."

The ocean floor is DISSOLVING rapidly, study warns (and human activity is to blame)

The chalky white seafloor, made up largely of calcite formed from the remains of marine organisms, is rapidly dissolving as a result of human activity, scientists warn.

This mineral plays a key role in preventing the ocean from becoming too acidic, by neutralizing carbon dioxide in the water, according to Daily Mail.

In several regions, the influx of carbon dioxide is much more than the naturally occurring calcite can handle, causing it instead to dissolve and turn the ocean floor into a murky brown.

According to a new study from McGill University the phenomenon occurring in these areas is likely just a glimpse at what will soon be a much bigger issue.

Birds startled by moving sticks

Do animals -- like humans -- divide the world into things that move and things that don't? Are they surprised if an apparently inanimate object jumps to life?

Yes -- according to scientists at the universities of Exeter and Cambridge.

The researchers tested how jackdaws responded to moving birds, moving snakes and moving sticks -- and found they were most cautious of the moving sticks according to Science Daily.

How spider eyes work together to track stimuli

Using a specially designed eye-tracker for use with spiders, biologists Elizabeth Jakob, Skye Long and Adam Porter at the University of Massachusetts Amherst, along with colleagues in New York and New Zealand, report that their tests in jumping spiders show a secondary set of eyes is crucial to the principal eyes' ability to track moving stimuli, according to Science Daily.

As Jakob explains, jumping spiders have excellent vision and eight eyes. The forward-facing principal eyes are shaped like long tubes inside the spider's head, with small, boomerang-shaped retinas that can detect color and fine details. Small retinas mean that the principal eyes also have a small field of view, she adds. To compensate, the eye tubes are surrounded by muscles that can direct the eyes to look within the visual field. She says, "I like the analogy of a flashlight beam, shining around the room and picking out only a little bit of the scene at a time."