Cement, first millennium b.c. – The foundation of civilization. Literally. Concrete Reinforced concrete Chemical reaction – water Self-healing – bacteria…

Concorde – turbojet-powered supersonic passenger airliner or supersonic transport (SST). It is one of only two SSTs to have entered…

Button – In modern clothing and fashion design, a button is a small fastener, most commonly made of plastic, but…

Bulldozer – a crawler (continuous tracked tractor) equipped with a substantial metal plate (known as a blade) used to push…

CT Scan (Computerized Tomography, CAT Scan) – an X-ray procedure that combines many X-ray images with the aid of a…

cable car – pulled along a fixed track by a moving steel cable. The power to move the cable was…

crayon – a stick of colored wax, charcoal, chalk or other material used for writing or drawing. There are also…

Do It Challenges for you to work on… Burglar Alarm – Stop, thief! Nobody will go unnoticed with this clever…

Learn about the exciting applications of polymers – the secret ingredient to most toys – and make your own bouncy…

Boeing 314 Flying Boat – Pan American Airways long-range aircraft. In February1936, Pan Am asked aircraft manufacturers for competitive bids…

Commemorative Air Force Women Airforce Service Pilots (WASP) – civilian female pilots, employed to fly military aircraft under the direction…

Diffusion of metallurgy in Europe and Asia Minor. The darkest areas are the oldest. Bronze Age – a period characterized…

Meet the people in brain imaging technology Katrin Amunts (video 3:54) is helping to map one of biology’s greatest conundrums:…