郑州近视手术预约(郑州做近视手术价格) (今日更新中)

MIAMI, Florida — On paper, the 40-foot wide pedestrian bridge on Florida International University's campus was an engineering feat, boasting several superlatives.Here are some, as outlined by the university: 215

Many of us can’t go a few seconds without checking our smartphone. Do you think you could last a whole year?Vitaminwater unveiled a challenge inviting anyone to “break the cycle with scroll-free life solutions” for 365 days for a chance to win 0,000.“This means you may not physically operate, caress, hug or otherwise be physically affectionate with anyone’s smartphone,” the company said on its website.Those interested in the challenge can enter by creating a Twitter or Instagram post but make sure to include hashtags #nophoneforayear and #contest.Laptops, destktop computers are OK to use. Voice activated devices are also OK.You have until Jan. 8, 2019 to enter.Vitaminwater said they will pick a winner on or around Jan. 22.Click here for a full list of rules.?  786

Meghan Markle said her father, Thomas Markle, will not be at the royal wedding. "Sadly, my father will not be attending our wedding," a statement from the bride-to-be via Kensington Palace read. "I have always cared for my father and hope he can be given the space he needs to focus on his health." The message came through a statement from Kensington Palace.  388

Major 2020 election news will likely take place with Democratic nominee Joe Biden set to reveal his pick for vice president. THE PROCESSThe Biden team has been very secretive with the vetting process like previous presidential campaigns. According to sources, many top-level advisers are not even privileged to the selection process. Biden said months ago he would pick a woman to be his running mate but has not narrowed it down any further. THE POSSIBLE PICKSWhile it is possible Biden will pick someone not on this list, it is expected he will choose from these 11 women: Stacey Abrams: A former legislator in Georgia who came close to winning the Governor's Race in Georgia in 2018. Abrams is an African American leader and viewed as a rising star but some question whether she has enough national experience. Tammy Baldwin: A United States senator representing the swing state of Wisconsin, but some question whether she has had enough exposure on the national stage. Karen Bass: A member of the House of Representatives representing California, Bass is an experienced legislator and African-American leader. Being from California, however, doesn't help with swing states.Keisha Lance Bottoms: Mayor of Atlanta and an African-American leader, Bottoms, however, has limited national experience. Val Demings: A member of Congress from the crucial state of Florida, Demings is a prominent member of the Congressional Black Caucus who gained exposure during the impeachment of President Donald Trump. Some attack her time as a police chief, however. Tammy Duckworth: A United States senator representing Illinois, Duckworth is also a veteran. Some wonder if she is well-known enough. Michelle Lujan Grisham: As governor of New Mexico and a former Member of Congress, Grisham has the experience and is one of the nation's top Latinas. Critics point to the fact few know her outside of New Mexico. Kamala Harris: A United States senator and African-American leader, Harris is well-known as a former presidential candidate. Some Biden advisers don't like how she attacked Biden during the campaign, not to mention her time as a prosecutor could hurt her with some voters. Susan Rice: An African-American woman who served as former National Security Adviser under President Obama, Rice has qualifications but has never held elected office. Gretchen Whitmer: Whitmer leads the swing state of Michigan as governor but some question whether Biden should pick an African-American to serve as his number two. Elizabeth Warren: Warren is well-known on the national stage as a progressive, which could help turn out for Joe Biden. However, she is also a lightning rod for conservatives. 2686

Maybe music artist Moby was right, and “we are all made of stars.” New research suggests the calcium in our teeth and bones came from star explosions.Researchers from Northwestern University looked at a calcium-rich supernova with x-ray imaging, which provided a glimpse into the last month of the star’s life and ultimate explosion.The findings, published in The Astrophysical Journal, suggest a calcium-rich supernova is a compact star that gives off an outer layer of gas as it’s dying. When it explodes, the star’s matter collides with material, emitting bright x-rays.The explosion is so intensely hot and high pressure, it allows nuclear fusion to produce a massive amount of calcium in mere seconds. Typically, a star creates a small amount of calcium slowly by burning helium.Half the calcium in the universe likely came from calcium-rich supernovae.“These events are so few in number that we have never known what produced calcium-rich supernova,” said Wynn Jacobson-Galan, a first-year Northwestern graduate student who led the study. “By observing what this star did in its final month before it reached its critical, tumultuous end, we peered into a place previously unexplored, opening new avenues of study within transient science.”The observed explosion was named SN 2019ehk in the Messier 100 galaxy. If that sounds a little too fantasy, just know it was 55 million light years from earth.“Without this explosion, you wouldn’t know that anything was ever there,” Margutti added. “Not even Hubble could see it.”The team was able to look at images from the Hubble Telescope of the area of SN 2019ehk before the explosion to compare before and after.The researchers are working on a follow-up study that includes how the supernova is evolving after the explosion, according to statements made to CNN. 1821

来源：资阳报