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发布时间: 2025-05-25 20:09:17北京青年报社官方账号
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  中山肛肠医院的评论   

WASHINGTON (AP) — For decades, there were tales from fishermen and tourists, even lots of photos, of a mysterious killer whale that just didn't look like all the others, but scientists had never seen one.Now they have.An international team of researchers says they found a couple dozen of these distinctly different orcas roaming in the oceans off southern Chile in January. Scientists are waiting for DNA tests from a tissue sample but think it may be a distinct species.The National Oceanic and Atmospheric Administration felt confident enough to trumpet the discovery of the long rumored killer whale on Thursday. Some outside experts were more cautious, acknowledging the whales are different, but saying they'd wait for the test results to answer the species question."This is the most different looking killer whale I've ever seen," said Robert Pitman, a NOAA marine ecologist in San Diego. He was part of the team that spotted the orcas off Cape Horn at the tip of South America.How different? The whale's signature large white eye patch is tiny on these new guys, barely noticeable. Their heads are a bit more rounded and less sleek than normal killer whales and their dorsal fins are narrower and pointed.They likely mostly eat fish, not marine mammals like seals, as other killer whales do, Pitman said. Fishermen have complained about how good they are at poaching off fishing lines, snatching 200-pound fish away.Pitman said they are so different they probably can't breed with other killer whales and are likely a new species. At 20 to 25 feet long (6 to 7.5 meters), they are slightly smaller than most killer whales. In the Southern Hemisphere, killer whales are considered all one species, classified in types A through C. This one is called type D or subantarctic killer whales.Michael McGowen, marine mammal curator at the Smithsonian, said calling it a new species without genetic data may be premature. Still, he said, "I think it's pretty remarkable that there are still many things out there in the ocean like a huge killer whale that we don't know about."Scientists have heard about these distinctive whales ever since a mass stranding in New Zealand in 1955. Scientists initially thought it could be one family of killer whales that had a specific mutation, but the January discovery and all the photos in between point to a different type, Pitman said.He said they are hard to find because they live far south and away from shore, unlike most killer whales."The type D killer whale lives in the most inhospitable waters on the planet. It's a good place to hide."Pitman got interested in this mysterious killer whale when he was shown a photograph in 2005. When he and others decided to go find them, they followed the advice and directions of South American fishermen, who had seen the whales poaching their fish.After weeks of waiting, about 25 of the whales came up to the scientist's boat, looking like they expected to be fed. Equipment problems prevented the scientists from recording enough of the whale songs, but they used a crossbow to get a tissue sample. Pitman said the whales are so big and their skin so tough that it didn't hurt them, saying the arrow "is like a soda straw bouncing off a truck tire."Pitman said he'll never forget Jan. 21 when he finally saw his first and then a bunch of the type D orcas."For 14 years I was looking for these guys. I finally got to see them," Pitman said.He acknowledged that he did sound like the revenge-seeking captain in the classic novel "Moby-Dick.""I guess I know how Ahab felt, but for a good reason," Pitman said. 3606

  中山肛肠医院的评论   

Walking down the halls of Mt. Jordan Middle School in Sandy, Utah, Dr. Matt Watts is everything you would expect a junior high school principal to be.Watts is a bit light-hearted.“Hey dude, how was the birthday?” Watts asked a passing student.However, he is always thinking of the well-being of his students.“Whoa guys, please be careful,” he said as he passed a couple of boys roughhousing in the halls.This year, the safety of students all over the country looks different than past school years.“If you walk around the school, you’ll see we’ve got arrows on the floors, signs up everything and even a maximum occupancy in bathrooms,” Watts said.Of course, there is also the mandatory school staple: masks.“That was probably one of the biggest things I was worried about, but the kids have done a fantastic job.”Mt. Jordan Middle school is one of the few schools in the country operating on a normal schedule of five days a week and in-person learning. However, it comes with its challenges.“One of the challenging things has been for teachers to find the balance with physical distancing and still taking care of the kids and kid’s social emotional needs,” Watts said.Teachers like Lindsay Maxfield are being tasked with the delicate balance of keeping their kids on track educationally, while being sensitive to the uncertainty of it all.“The (students) have been able to have a lot of really good discussion, which at the beginning of the year with their masks they were a lot quieter,” teacher Lindsay Maxfield said. “I’ve noticed they’re getting more comfortable speaking out with their masks. That has been a really cool thing to see.”Maxfield knows that at any moment, the teaching model could change and move to an online curriculum.“I didn’t think through all the online different tech issues that sometimes you need to teach the students,” Maxfield said. “Sometimes, we assume that they know how to do everything because they’re so techy and that kind of thing.”As the temperatures start to drop, the possibility of more cases hangs in the air.“A concern now is that it’s getting cold,” Watts said. “We’ve been letting kids eat outside so they can be distant and have that fresh air and now, but the cold is making us rethink what the cafeteria is going to look like.”For now, the school is beating the odds with very few cases of COVID-19.“When we have had to send some kids home, that gets tough because they want to be here,” Watts said.Lifelong educators dealing with a once-in-a-ifetime test, committed to keeping their doors open for as long as possible. 2580

  中山肛肠医院的评论   

Video footage shows the drug raid where Detroit police officers from two precincts got into a violent confrontation with one another.  147

  

WASHINGTON (AP) — Former Vice President Joe Biden said Sunday he doesn't believe he ever acted inappropriately toward women but will "listen respectfully" to suggestions he did.Biden, who is deciding whether to join the 2020 presidential race, released a new statement in response to allegations from a Nevada politician that he kissed her on the back of the head in 2014 and made her uncomfortable."In my many years on the campaign trail and in public life, I have offered countless handshakes, hugs, expressions of affection, support and comfort. And not once — never — did I believe I acted inappropriately," he said. "If it is suggested I did so, I will listen respectfully. But it was never my intention."The allegation was made in a New York Magazine article written by Lucy Flores, a former Nevada state representative and the 2014 Democratic nominee for Nevada lieutenant governor.Going on the attack against the prospective 2020 contender, White House counselor Kellyanne Conway said Flores was "quite bold" to "go up against the highest levels of her political party" with the allegations and suggested that Biden should consider apologizing to Flores."If anybody just types in 'Creepy Uncle Joe Videos' you come up with a treasure trove," Conway told "Fox News Sunday.""I think Joe Biden has a big problem here because he calls it affection and handshakes. His party calls it completely inappropriate," she said.Some of the Democratic presidential candidates have expressed support for Flores, but they haven't said it disqualifies Biden from joining the race.Sen. Amy Klobuchar, D-Minn., a candidate for president, said she had "no reason not to believe" Flores' allegations."And I think we know from campaigns and from politics that people raise issues and they have to address them and that's what he will have to do with the voters if he gets into the race," Klobuchar told ABC's "This Week."Speaking to reporters in Iowa over the weekend, Massachusetts Sen. Elizabeth Warren and former HUD Secretary Julian Castro said they believed Flores and indicated it's up to Biden to decide whether he should join the race.In the New York Magazine article published Friday, Flores wrote that she and Biden were waiting to take the stage during a rally in Las Vegas before the 2014 election."I felt two hands on my shoulders. I froze. 'Why is the vice president of the United States touching me?'" Flores wrote. "He proceeded to plant a big slow kiss on the back of my head."The rally's organizer, Henry R. Munoz III, said in a statement Saturday that he spoke to several key people and staff who attended the rally and that they "do not believe that circumstances support allegations that such an event took place." 2729

  

VIENNA — Austrian authorities say at least one gunman, shooting apparently at random in a popular Vienna nightlife area hours before a coronavirus lockdown took effect, killed four people in an Islamic extremist attack. They said Tuesday that the suspect, who was shot and killed by police, was a young Austrian-North Macedonian dual citizen who had a previous terror conviction for attempting to join the Islamic State extremist group in Syria.Chancellor Sebastian Kurz said two men and two women died from their injuries in the attack Monday evening. He said a police officer who tried to get in the attacker’s way was shot and wounded, and another 14 people were hurt. Police have arrested several other people and searched 15 houses and apartments 759

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