甘肃自主神经解剖模型(呼和浩特人体头颈部横断断层解剖模型(17片)) (今日更新中)

This week countless photographs have offered close-up depictions of the destruction caused by California wildfires. Now, with the help of its satellites, NASA has released pictures giving a different perspective.NASA's Landsat 8 satellite captured this first image of the Camp Fire on the morning of November 8, just a few hours after the blaze had broken out. That fire grew quickly, torching 20,000 acres in less than 14 hours. At one point, it grew by a average of more than one football field every three seconds.The fire in the picture is highlighted, and beneath that smoke the flames are encroaching on the northern California community of Paradise, where it's estimated that up to 90% of homes have been destroyed.The second image, captured by NASA's Terra satellite, gives a better sense of the scope of the Camp Fire in relation to the state. Smoke from the blaze obscures a wide swath of the northwestern part of the state, stretching south from Paradise to just north of San Francisco. 1005

There's a new concept to contraception, and you may start seeing more advertising for it soon.It's an app, and the U.S. Food and Drug Administration (FDA) just gave it the green light to start marketing.Natural Cycles claims to help prevent pregnancy by allowing women to track the days they are most fertile. It uses a woman's monthly cycle information and their body temperature, which users input daily.The app provides a calendar of green and red days. Green days indicate you're not fertile, while red days suggest you are.The app claims its’s 93 percent effective if used correctly. That estimate may be high though.Planned Parenthood, in general, claims fertility awareness is only between 76 and 88 percent effective.Regardless, the app does nothing to prevent sexually transmitted diseases.   The president of Advocates for Youth, a national organization that promotes young people’s rights to sexual health information, says there are some concerns surrounding the app.“Especially for many younger women, their cycle isn’t exactly regular, so if you've got an irregular cycle or you really don’t understand the implications of using fertility awareness, it’s a tough method to use,” explains Deb Hauser. “It’s not by any means foolproof.”The Natural Cycles app costs for a year or a month.The free trial offer isn't really going to help you, because it takes a few months for the app to get to know your body. 1445

This year has been, unique, to say the least, and the holidays will be different and maybe lacking some familiar comfort food from family. Taco Bell is bringing back a menu item to give fans warmth and tradition.Nacho Fries will be available at participating locations nationwide starting on December 24. This is the second time this year the item will be available.“In a year as difficult and uncertain as this one was, we know that consumers crave the comforts they love most. That’s why we’re excited to bring back Nacho Fries for our passionate fans to close out this year and kick off 2021 positively and deliciously,” said Nikki Lawson, Taco Bell’s Chief Global Brand Officer, in a press release.Nacho Fries first appeared on the Taco Bell menu in January 2018.The fries are seasoned with what Taco Bell refers to as Mexican spices and served with a side of nacho cheese sauce.Other new menu items will be available on Christmas Eve, including a nacho taco, cravings pack and a new bacon chalupa. 1010

To the Black Friday victors go the spoils.Use these hacks to guarantee yourself the deals you want, whether you decide to shop from your couch or at the store. 177

Thursday marks exactly six months since the World Health Organization (WHO) declared a global health crisis connected with the disease that was then simply known as the novel coronavirus.Half a year later, the virus has infected 17 million people on every continent and killed more than 600,000 worldwide.On Jan. 31, WHO issued a statement saying that Dr. Tedros Adhanom, the director-general of the organization, had accepted a committee's recommendation to declare the outbreak of the virus in China a "public health emergency of international concern."At the time, the outbreak was mainly concentrated in China, as the country had confirmed 7,711 cases of the virus and 170 deaths linked to the disease. While the virus had been recorded in five other countries — including five cases in the U.S. — there had been no deaths recorded outside of China.In its Jan. 31 declarations, the WHO did not recommend any travel or trade restrictions, but urged countries to prepare for containment and "place emphasis on reducing human infection, prevention of secondary transmission and international spread."The organization issued its recommendation 10 days after China reported that the virus appeared to be spreading from person-to-person, a finding that indicated the disease could have far-reaching implications. The New York Times reports that by that time, thousands had traveled out of Wuhan, the virus' place of origin, possibly spreading it around the world. China has since faced criticism for not reporting its findings sooner.That same day, President Donald Trump took action to block entry into the U.S. of any person that had been in China for the last 14 days. The order did not apply to U.S. citizens. While the move may have temporarily delayed the virus' widespread arrival, his administration's inaction for the next month would prove costly.During the next month, the CDC would face significant delays in developing a test for COVID-19, which would cause a testing backup in the months to come. The president also repeatedly downplayed the severity of the situation, declaring on Feb. 26 that the number of cases in the U.S. would go down to zero in the coming days.In the months since the WHO's declaration, 150,000 Americans have died of COVID-19, and more than 4 million have been infected. Both figures are by far the most of any other country. 2370

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