Aerial view of Castillo de San Felipe at the edge of Río Dulce in eastern Guatemala. Historic stone fort surrounded by palm ...

In "Mapmatics," a mathematician tells the stories of how math helps us track epidemics, map the seafloor, and plot a complex delivery route.

Columbus wasn't the first European to reach the Western Hemisphere; the Vikings had landed in Newfoundland about 500 years ...

Nicole Brown Chau is a deputy managing editor for CBSNews.com. She writes and edits national news, health stories, explainers and more. Nikki Nolan is a meteorologist for CBS News and Stations. She ...