YouTube on Monday said people around the world watch more than a billion hours of content on their platform every day. Cristos Goodrow, the vice president of engineering at YouTube, in a blog post said they had reached the billion-hour milestone last year.

“If you were to sit and watch a billion hours of YouTube, it would take you over 1,00,000 years,” Goodrow wrote. “1,00,000 years ago, our ancestors were crafting stone tools and migrating out of Africa while mammoths and mastodons roamed the Earth.”

YouTube said that instead of focusing on how many views a video received, it had turned its attention to how much time people spent watching a video. “People are spending a billion hours every day rewarding their curiosity, discovering great music, keeping up with the news, connecting with their favorite personalities, or catching up with the latest trend,” Goodrow said.

The company reported a 10-fold increase in viewership since 2012, reported The Wall Street Journal. On an average, over 400 hours of video is uploaded each minute, it said.