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Three visitors were injured, one fatally, in falls in Yosemite National Park last week, and officials are imploring tourists to avoid venturing off-trail.A 21-year-old man died after he slipped and fell from the base of a waterfall in the California park, National Park Service officials told CNN on Monday.He was one of three people to slip near waterfalls in the park last week, officials said in a 413

Three siblings were killed and another was seriously injured after a vehicle struck a horse-drawn buggy in Michigan on Wednesday afternoon, authorities said.The Amish children, ages 6 to 13, were traveling home from school around 3:20 p.m. when a vehicle struck their buggy from behind in Chester Township, Michigan, Eaton County Sheriff Tom Reich said.An elderly man who was driving the vehicle was taken to a hospital, 433

Thursday marks Pi Day, otherwise known as 3.14, which marks the ratio of a circle's circumference to its diameter. While the average citizen can easily remember the 3.14 ratio, the exact ratio practically has an infinite amount of numbers. If you want a more precise pi ratio, it is 3.141592653589793238462643383279. How well do you think you could remember just those 30 digits? One man was able to remember the ratio of pi up to 70,000 decimal places. Rajveer Meena accomplished the feat on March 21, 2015 while wearing a blindfold. According to the Guinness Book of World Records, Meena's feat took nearly 10 hours to accomplish. According to Five-Thirty-Eight, there are now more than 22 trillion know digits to pi. According to Five-Thirty-Eight, it took a Dell computer nearly 105 days of computation to come up with the large number of digits. This is compared to just 2,000 known digits of pi in the mid-20th century. So how does one remember so many digits? Savant Daniel Tammet, who is able to remember pi's calculation to more than 20,000 digits, told David Letterman, "What I am doing is visualizing numbers." he said. "When you look at a number, you just see the numbers four and three. When I am looking at numbers, I am seeing different colors and shapes and textures. It is called 'synesthesia.' My brain is working in such a way I am looking and also experiencing color. It is two senses combined. "Having a more exact number of pi helps scientists at NASA conduct more precise experiments and calculations. Having more exact figures helps lend precision to projects such as landing rovers on Mars, sending spacecraft into deep space or tracking the movement of asteroids. To see many of the ways NASA uses pi, click 1746

The storm's well-formed eye is ominous as it takes aim just south of Hawaii.Hurricane Erick is now a Category 3 storm, packing sustained winds of 125 miles per hour. That makes it a major hurricane.New satellite imagery from the National Oceanic and Atmospheric Administration shows the storm's clearly defined eye and powerful eye wall, the ring of storms that surround the storm's center."The satellite loop shows a very strong hurricane with a well-formed eye," CNN senior meteorologist Brandon Miller said. "But while the eye of the storm looks mostly clear, closer inspection reveals some small, spinning cloud streaks that are hallmarks of very intense hurricanes and typhoons."Those little swirls are known as mesovortices and can contain some of the strongest winds, especially when they are located in the eye wall.Yes, it looks very doom and gloom, but there's good news for Hawaii: The storm is not expected to make landfall. 948

The suspect transferred the registration of a 1993 Jaguar XJR6 to someone else in Germany the day after Madeleine disappeared in 2007. 146

来源：资阳报