Semi-trailer truck – a large vehicle that consists of a towing engine, known as a tractor or truck, attached to…

Sewing machine – machine used to stitch fabric and other materials together with thread. Sewing machines were invented during the…

Screw – one of the six simple machines. Screw: An inclined plane wrapped around a shaft or cylinder. This inclined…

Seawall – a form of coastal defense constructed where the sea, and associated coastal processes, impact directly upon the landforms…

Seat Belts Mean Safety Seat belts have been keeping people safe in cars for more than fifty years. The best…

self-driving cars fully autonomous car self-driving cars – news, updates drivers want… – drivers and passengers want mainstream features that…

Scissors – Who invented scissors? What were early scissors made of? Is there more than one type of scissors? Scissors…

Human waste – everybody poops. Sanitation toilets human waste safe drinking water water for cooking, bathing disposal of waste water…

Pictured: A GOES-13 satellite image captured at 17:45 UTC on January 2, 2014, depicting an ongoing blizzard across portions of…

Behind every successful science discovery, there is an engineer. For really big science projects, like the NASA Space Program, thousands…

San Francisco Cable cars are the only mobile National Monuments. A third of commuters in San Francisco use public transportation…

Sailboat – a boat propelled partly or entirely by sails. The generic term covers a variety of boats, larger than…