Scientists pinpoint key hotspot driving tau propagation in dementia - News-Medical

Lead mining began during the 7th century in Derbyshire, England. Magpie Mine was the last facility to operate in the region. It opened in 1735 and finally closed in 1954. Thanks to some medieval human teeth, archaeologists have pinpointed when lead production first expanded across Europe during the Middle Ages. By examining dental enamel collected from graves located in central England, researchers now know the post-Roman society started mining and smelting again during the mid-7th century. As the team explains in a study published today in the journal Antiquity, the consequences of exposure to the toxic were stark—but distributed unequally among locals.

The ocean is filled with sound, and for sharks, those sounds can reveal what is happening well beyond their field of view. Noise produced by prey, predators, and other animals may provide important information about the surrounding environment. Yet scientists have had little direct evidence showing just how far a shark swimming freely in the ocean can hear, or whether it can tell where a distant sound originated. A new study from Florida Atlantic University is beginning to answer those questions. Researchers studying blacktip sharks (Carcharhinus limbatus) used an underwater speaker, a drone, and wild sharks swimming naturally in coastal waters. They found that the animals could detect sounds from substantial distances and abruptly turn away from the source, even when it was nearly 250 feet away.

The spacecraft delivered materials and equipment for new research studies to the station.