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.

Step selection functions are a useful tool for analysing fine-scale human movements to understand environmental interactions in the context of infectious disease epidemiology.

GRIFFITH, Australia—At a tiny airport in the Australian countryside last month, a small plane took off carrying a device that could transform how U.S. drones, aircraft and ships navigate across future ...

California has hired Oregon defensive coordinator Tosh Lupoi, bringing the former Golden Bears player and assistant back as the head coach. The postseason magic continues for the University of ...

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