Almanac: The infinity symbol. December 3, 2017 / 9:17 AM EST / CBS News And now a page from our "Sunday Morning" Almanac: December 3, 1616, 401 years ago today -- a ...

The post-credits scene of Avengers: Infinity War confused everyone that's not been keeping up with Marvel Comics. Now the Captain Marvel trailer solves the big beeper mystery.

Kent has a long history with the infinity symbol. Mathematician John Wallis, who was born in Ashford in 1616, is credited with its creation in 1655.