Researchers have discovered a 525-million-year-old fossil which belongs to a group of tentacle-bearing creatures which lived inside hard tubes.
The creature belongs to a group called pterobranch hemichordates which are related to starfish and sea urchins but also show some characteristics that offer clues to the evolution of the earliest vertebrates. About 30 species of pterobranch are known to exist today although 380-490 million years ago a group of these animals called graptolites were common across the prehistoric oceans.
Scientists are launching a three-pronged attack on one of the most obstinate puzzles in materials sciences: what is the pseudogap?
They used three complementary experimental approaches to investigate a single material, the high-temperature superconductor Pb-Bi2201 (lead bismuth strontium lanthanum copper-oxide). Their results are the strongest evidence yet that the pseudogap phase, a mysterious electronic state peculiar to high-temperature superconductors, is not a gradual transition to superconductivity in these materials, as some have long believed.
Instead, it is a distinct phase of matter.
The pseudogap mystery
The Clovis people, Paleo-Indians whose tools were known for their distinctive 'fluted' points, were once thought to be the original settlers of North America about 13,000 years ago. The name originates not from the 5th century Frankish king but rather the town in New Mexico where the stone projectile points created by their distinctive percussion and pressure flaking techniques were first discovered.
Losing virginity can improve your self-image, according to Penn State researchers - if you are a college-age male. On average, college-age males become more satisfied with their appearance after first intercourse while college-age females become less satisfied.
Overall the researchers found that women became happier with their physical appearance from first to fourth year in college, and men became less satisfied with their appearance over the same time period. However, the researchers found the opposite directly after students had sex for the first time; males were more satisfied with their appearance and females were less satisfied.
In Australia, babies born since 1971 have had drops of blood taken, which are then tested for a variety of genetic conditions such as cystic fibrosis.
It has been an effective health check, according to Dr. Diana Bowman from the Melbourne School of Population Health, but because there are no laws which define the ownership, storage and use of those blood drops, it could threaten public trust in newborn screening (NBS) programs in Australia. The tests and what is done with the blood afterwards raises many legal questions.
Tree islands, patches of high, dry ground a meter high that dot the marshes of the Florida Everglades, are elevated enough to allow trees to grow and provide a nesting site for alligators and a refuge for birds, panthers, and other wildlife.
And those critters may have anthropogenic garbage left by early man to thank for it. Garbage mounds left by prehistoric humans might have driven the formation of many of those Everglades' tree islands, distinctive havens of exceptional ecological richness in the sprawling marsh that are today threatened by human development.