昌吉阴茎海绵体疼(昌吉如何治疗海绵体受损) (今日更新中)

If you're interested in fish who are scary-looking, poisonous and chock-full of elaborate defense mechanisms, look no further than the stonefish, a genus of fish that populate coastal waters of the Indo-Pacific region.As if their deadly venom and spiny exteriors weren't enough, scientists at the University of Kansas have found that stonefish also have a hidden switchblade on their face that they can flick out whenever they feel like they're in danger.Scientists call the bony, blade-like protrusion a "lachrymal saber," because it is located on a bone under the fish's eyes. Also, "lachrymal saber" is just a really metal-sounding name.William Leo Smith, associate curator and associate professor of ecology & evolutionary biology at KU, first started to understand how the lachrymal saber worked 15 years ago, when he was dissecting a stonefish he kept as a pet.This is a game-changerHe tells CNN the mechanism isn't just a cool new discovery (although it's that, too). It also changes the scientific understandings and classifications of this particular type of fish."It opens up these ideas of ecological questions. Muscular systems, bone systems, nervous systems all came together to form this. What led to its evolution or use?In other words, he says, "Why do we see this accumulation of so many horrible things on one fish?"The lachrymal saber is housed inside the fish's head, and they use their cheek muscles to deploy it. Though some stonefish are venomous, the saber is not.It could be a sex thing, tooSmith says he and his fellow researchers have reason to believe the saber isn't just for warding off predators: It could be a sex thing, too."There is evidence pushing towards that," he says. "They may use this in battles with other members of their species, like ram horns. It may also be involved in courtship behaviors."Oh, and the sabers glow."It's fluorescent green," Smith says. Since stonefish rely on camouflage for both protection and hunting prey, Smith doesn't think the fluorescence has a defensive purpose like, say, warning off predators.There are 134 described species of stonefish, and by Smith's observation, all of them have some form of lachrymal saber.  2202

In an interview with Axios reporter Jonathan Swan that aired Monday evening, President Donald Trump said he isn't sure what late Georgia Congressman and civil rights leader John Lewis' legacy will be.Trump's comments aired less than a week after he chose not to pay his respects to Lewis when he was lying in state at the U.S. Capitol Rotunda.When asked how he thinks history will remember Lewis, Trump said he didn't know, adding that the Lewis did not attend his inauguration."I don't know, I really don't know. I don't know John Lewis. He chose not to come to my inauguration. I never met John Lewis, actually, I don't believe," Trump said. 651

If you have any old Levi jeans lying around and don't want them anymore, Levi's will take them back.This week, the clothing company launched a denim buyback program through its recommerce website Levi's Secondhand. The way it works is you drop off used Levi’s jeans and denim jackets at participating stores and you'll receive a gift card in exchange.Your items will then be professionally cleaned and then listed on the Secondhand website, "keeping garments in use and out of landfills," Levi's stated on its website.According to Vogue, some of the clothing will be handpicked vintage items, but most will come directly from consumers. 644

IMPERIAL BEACH, Calif. (KGTV) - A member of the migrant caravan was arrested in Tijuana on suspicion of throwing rocks over the U.S.-Mexico border fence toward contractors working on the wall.The incident happened about 1:30 p.m. Thursday, Dec. 6, as crews were in the Imperial Beach area. The contractors left and agents arrived to provide security, Customs and Border Protection officials said. No contractors or agents were hit and the wall was not damaged, according to the CBP.When the man threw another rock across the border, agents alerted Tijuana Police to arrest him.CBP said the man was a 27-year-old Honduran national. Mexican officials said he would be turned over to immigration authorities for deportation. 729

Hundreds of parishioners gathered at a Pennsylvania church Wednesday to exchange or renew their wedding vows -- some clutching unloaded AR-15 rifles, according to CNN affiliate WFMZ-TV.The event was led by Pastor Hyung Jin Moon at the controversial Sanctuary Church in Newfoundland.Guns were zip-tied at the door and ammunition was not allowed in the church, WFMZ reported. It said the Wallenpaupack Area School District moved students of a nearby elementary school to other campuses.  498

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