Balloon catheter – a tool to remove clots without major surgery. Since its first use in 1961, the balloon catheter … More

What’s the problem? How can we make a bandage to cover a cut on someone’s finger so that it is … More

Barometer Mercury – density of mercury, 13.5462 g/cm3 at 20°C, That’s engineering mercury – the only elemental liquid metal Engineering … More

Single Leaf Bascule Bridge – engineering demonstration (video 6:04) This is a simple demonstration of a model that was constructed … More

Aviation – the design, development, production, operation, and use of aircraft, especially heavier-than-air aircraft. Aviation is derived from avis, the … More

Aviation safety – the theory, investigation, and categorization of flight failures, and the prevention of such failures through regulation, education, … More

The name “backhoe” refers to the action of the shovel. A backhoe digs by drawing earth backwards, rather than lifting … More

The earliest tools were made of stone. Some predate early man as Neanderthal and other early ancestors used rocks and … More

Automotive Engineering The automobile, late 19th century – Transformed daily life, our culture, and our landscape Between 1920 and 1970, … More

If founder Elon Musk is right, Tesla Motors just might reinvent the American auto industry—with specialized robots building slick electric … More

Pictured: taken by astronauts aboard the International Space Station (ISS) of the Earth’s atmosphere as seen from orbit. The Earth’s … More

Music – an art form whose medium is sound and silence. Its common elements are pitch (which governs melody and … More