Get your Christmas tree permit from BLM or USFS in Colorado. Cut trees in designated areas, enjoy the outdoors, and support forest health.

Optical illusions can challenge your brain to the max. These visual illusions can trick your eyes and mind so that you may see things that aren't there or miss out on what's hiding in plain sight.

In the austere outpost of the future, the Corps wants its aircraft to land on a functioning airfield 90 minutes after the required equipment is flown in.

The Environmental Protection Agency is moving forward with approvals for pesticides containing “forever chemicals” as an active ingredient, dismissing concerns about health and environmental impacts ...

The Portland Timbers celebrated their historic 2015 MLS Cup run by premiering a short film that takes fans through the season.