How many cups of coffee will refresh you? Determined by genes

Australian 18-year-old Lachlan? Smart recently completed a solo flight around the world in a single-engine plane, becoming the youngest pilot to set the record.

Smart took off on July 24 and took seven weeks to circle the earth back to its starting point. During this period, he stopped at 24 locations in 15 countries and flew 45000 kilometers.

Speaking of the round-the-world flight, Smart said the biggest challenges are weather and air traffic control. "in Saudi Arabia, air traffic control delayed me for five and a half hours, and a similar situation happened in India and Malaysia."

By the 27th, Smart's age was 18 years, 7 months and 21 days, a year younger than the American Gus Miller when he accomplished the same feat. In 2014, Gusmiller flew around the world in 45 days, when he was 19 years old, 7 months and 15 days at work. "it is often used to describe people who work seriously, but in Texas, a plumber actually" buried "himself in his work. The cause is that the homeowner reported for repair: the water pipe is leaking, and Jimmy the plumber? Cox came and dug all the way under the lawn and finally found the pipe that sprayed water out of the ground. In order to repair the leaky pipe, the whole upper body was stuck in a mud puddle with his head down. On the Internet: why is it that some people can refresh themselves with a cup of coffee while others have to drink five cups in a row? This is determined by genes, according to a joint study. The researchers analyzed the DNA of 3000 "coffee powder" in the Netherlands and Italy and asked them to fill out questionnaires about their average daily coffee consumption. They found that subjects with a certain genetic mutation consumed less coffee a day than those who did not. Studies have shown that carrying this genetic mutation reduces the body's ability to break down caffeine, allowing caffeine to stay in the body for longer. However, the researchers say more research is needed to understand the biological link between the gene and coffee consumption