People spend approximately 90 percent of their time indoors where most respiratory infections—a leading cause of death ...

Rising mountain peaks and sharp rock formations cover the ocean floor, with corals, sponges, fish, and tons of sea creatures ...

The library of the Perkins School for the Blind holds a collection of dozens of Martin Kunz's tactile graphics.

Located in a historic railway station that dates back to 1925, the Louisiana Art & Science Museum features a variety of permanent and temporary exhibitions as well as a planetarium. The museum ...

Some materials let electricity pass through them easily. These materials are known as electrical conductors. Metal is used in plugs to allow electricity to transfer from the wall socket, through ...

Browse 24,200+ heart clipart outline stock illustrations and vector graphics available royalty-free, or start a new search to explore more great stock images and vector art. Editable stroke. Black ...