On this day, 68 years ago, on November 3, 1957 (September 12, 1957 in the lunar calendar), the Soviet Union's dog-carrying satellite-2 ascended into space. A dog's space travel While the toot sound from Soviet satellites was already distracting Americans, Sputnik 2 carrying a dog named Laika returned to the sky on November 3, 1957. This is an unexpected trick developed by the Soviets. Some instruments attached to the puppy can provide intelligence on whether the animal can survive in outer space. Sputnik-2 weighs 1,120.29 pounds, six times that of Sputnik-1, and is also equipped with more advanced instruments for measuring cosmic rays, temperature, pressure, etc. than Sputnik-1. As the first living thing in space, Leica died six days later, although the acceleration and weightlessness of the satellite did not have any adverse effects on it, and died when oxygen in the non-recoverable Soviet satellite was exhausted. In any case, this is enough to make public opinion in the United States explode. The appearance of a dog on Sputnik 2 clearly showed that the Soviets were ultimately going to send a man to the moon. Most Americans have always been determined to defeat the Soviet Union on the desolate moon, and they have become unable to tolerate America's backwardness in the space race. There was a headline in the Pittsburgh News pleading: "Ike, launch satellite." Sure enough, a month later, on December 6, the United States launched its first satellite, but it tragically exploded during launch. As people watched, the second section of the troubled U.S. Navy's Pioneer missile was placed on top of the first, and the Pioneer missile was mounted on the Caraval missile launch pad. On December 6, the United States used this rocket to launch its first satellite. The Pioneer rocket carrying the satellite exploded two seconds after takeoff. Fortunately, the artificial satellite was not damaged and continued to send signals. American public opinion regarded this failure as an "unfortunate shame." Then on the 16th of the same month, the United States immediately launched the intercontinental missile Atlas (the former Soviet Union announced the successful intercontinental missile test on August 26 and claimed to surpass the United States in cutting-edge military technology, while the United States launched the intercontinental missile on June 2 ended in failure), saving some face. The first animal in space died in a desperate situation after just six days as a hero