A new generation began yesterday. According to the demographers who help define the generational age groups, Generation Alpha came to an end at midnight, and those born in the new year will technically be a part of Generation Beta. The experts say Gen Beta will include those born between 2025 and 2039. They say by 2035, Gen Beta will make up 16-percent of the global population, and that many of them will live to see the 22nd century.