CNN 10: The big stories of the day, explained in 10 minutes

Today on CNN 10, we get an update out of South Korea where the president declared martial law in a surprise address to the nation. Then we get an inside look at how one company is using facial recognition to make parts of everyday life easier. We also meet a man on a mission to plant one million coral by the end of next year.

And we'll learn about new innovation in food that you can't see or eat. All this and more on today's CNN 10!.