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Construction
Sports Medicine
Healthy Aging
Sports Science
Attention Deficit Disorder
Engineering and Construction
Collapse of the World Trade Center
On September 11, 2001, the two main towers of the World Trade Center complex were each hit by hijacked commercial aircraft as part of the September 11, 2001 attacks. 2 WTC collapsed to the ground at ... > more -
Radiant energy
Radiant energy is the energy of electromagnetic waves. The term is most commonly used in the fields of radiometry, solar energy, heating and lighting, but is also used less frequently in other fields ... > more -
Sports Science
Sports Medicine
Healthy Aging
Attention Deficit Disorder
Textiles and Clothing
Pregnancy and Childbirth
Leonardo da Vinci
Leonardo da Vinci (born April 15, 1452 in Vinci, Italy, and died on May 2, 1519 in Cloux, France) was an Italian Renaissance architect, musician, anatomist, inventor, engineer, sculptor, geometer, ... > more -
Photography
Photography is the process of making pictures by means of the action of light. It involves recording light patterns, as reflected from objects, onto a sensitive medium through a timed exposure. The ... > more -
Supercooling
Supercooling is the process of chilling a liquid below its freezing point, without it becoming solid. A liquid below its freezing point will crystallize in the presence of a seed crystal or nucleus ... > more -
Chemical bond
A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing, as well as exchanging, of electrons -or electrostatic ... > more
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