Do your part...before they go extinct. TOKYO: Japanese researchers on Friday unveiled a population clock that showed the nation's people could theoretically become extinct in 1,000 years because of declining birth rates. Academics in the city of Sendai said that Japan's population of children aged up to 14, which now stands at 16.6 million, is shrinking at the rate of one every 100 seconds. Their extrapolations pointed to a Japan with no children left within a millennium. "If rate of decline continues, we will be able to celebrate the Children's Day public holiday on May 5, 3011 as there will be one child," said Hiroshi Yoshida, an economics professor at Tohoku University. "But 100 seconds later there will be no children left," he said. "The overall trend is towards extinction, which started in 1975 when Japan's fertility rate fell below two." Yoshida said he created the population clock to encourage "urgent" discussion of the issue. Another study released earlier this year showed Japan's population is expected to shrink to a third of its current 127.7 million over the next century. Government projections show the birth rate will hit just 1.35 children per woman within 50 years, well below the replacement rate. Meanwhile, life expectancy is expected to rise from 86.39 years in 2010 to 90.93 years in 2060 for women and from 79.64 years to 84.19 years for men.