Acid rain cycle Acid rain is a serious environmental problem that affects large parts of the United States and … More

Moveable type and plate Paper, second century – “The idea of stamping images is natural if you have paper, but … More

Water slide National Geographic takes a high-level look at the physics behind waterslides. A lot of science goes into providing … More

Woman with wheelbarrow The lever, third millennium b.c. – The Egyptians had not yet discovered the wheel when they built … More

X-48B Blended Wing Body aircraft during test flight Aeronautics is the study of the science of flight. Aeronautics is the … More

Green roof Urban rooftop agriculture may be the best solution to feeding people who live in cities. That garden is … More

Animation sequence of a horse in motion. Muybridge Photography, early 19th century – Changed journalism, art, culture, and how we … More

STS-133 International Space Station after undocking 5 International Space Station – a habitable artificial satellite in low Earth orbit. Orbit … More

U.S. Patent number 872,795, issue date 1907-12-03 Vacuum flask (or Dewar flask or Thermos) has the remarkable capacity to hold … More

Sperm whale ocean engineering – covers everything from oceanographic surveying to naval architecture to water sports equipment design to animal … More

  Surfaces tension – The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension. The … More

Electronic toll collection (ETC) – To eliminate the delay on toll roads by collecting tolls electronically, ETC determines whether the … More

  Wave energy generator – a floating, flexible, modular and massively scalable wave power generation idea under testing in Scotland … More

  Basics of solar efficiency for using solar power for providing electricity for home use Solar batteries – Solar batteries … More

Garrett Morgan — The Gas Mask, Hair Straightener, Traffic Signal and More Garrett Morgan only had an elementary school education, … More