The U.K. Coal Authority launched Thursday a mobile friendly version of its popular Interactive Map Viewer, which allows anyone to view selected coal mining information on a smart phone or tablet.

Terraria can become overwhelming quickly. Luckily, we've compiled a list of the best map viewers to help uncover all the secrets of the map you're currently on.

Zulu Ecosystems and National Library of Scotland collaborated to digitally map ancient woodlands from 180 years ago for the first time.