Video report on endangered species: The last cats - U.S. Jaguar, Black bears, Sonoran pronghorns, Ocelots, Bighorn sheep. Tutu'uli, a 6-month-old female jaguar at the Ecological Center of Sonora in Mexico. By the time Congress enacted the Endangered Species Act in the 1970s, the last known American jaguars were gone. Read More You are free to...

The LEGO® Creator Expert Vestas® Wind Turbine, made with a plant-based material sourced from sugarcane, the bioplastic collection is the first step towards the company’s goal to produce all of their products and packaging with sustainable material by 2030.You are free to download and share our list of learning activities. Reduce, Reuse,...

A detailed look at the Lego Creator Expert 10268 Vestas Wind Turbine with Power Functions medium motor, battery box, 2 19.6” (50cm) extension wires and LED lights. Made with a plant-based material sourced from sugarcane, the bioplastic collection is the first step towards the company’s goal to produce all of their products and packaging...

Watch a video summary of the news coverage on September 11, 2001. You can find a more complete version of this collection (3000 hours of television from 20 channels over 7 days) at Understanding 9/11: A Television News Archive.  Read More You are free to download and share our list of learning activities. About September 11 Collection ...

An air traffic control game designed to interest students in aeronautics-related careers. As the lead air traffic controller, your job is to guide the planes safely through Sector 33 as quickly as possible. To do this, you must choose the most efficient route and make strategic speed changes. All items are free to view, share, and download. ...

Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope. It is being used in planetarium projectors. Just set your coordinates and go. All items are free to view, share, and download. Read More

Orbiter is a free and realistic space flight simulation program for the Windows PC. Orbiter gives you an idea what space flight really feels like. The concept is similar to traditional flight simulator software, but you are not limited to atmospheric flight. Orbiter allows you to experience manned and unmanned space flight missions from the...

Although it is optimized for 3D astronomical visualization, Celestia can be used to display and explore other 3D environments, too. The free space simulation that lets you explore our universe in three dimensions. Celestia runs on Windows, Linux, and Mac OS X. All items are free to view, share, and download. Read More

FlightGear is a flight-simulator created by an international group of volunteers, and released as free, open-source GPL software. It has been used for academic research, education, and for fun. All items are free to view, share, and download. Read More