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Ape skeletons

Evolution is the change in the inherited traits of a population of organisms through successive generations.

Portrait of Elizabeth I

Elizabeth I (1533–1603) was Queen regnant of England and Queen regnant of Ireland from 17 November 1558 until her death. Elizabeth was the fifth and last monarch of the Tudor dynasty.

Satellite composite image of Antarctica

Antarctica is Earth's southernmost continent, encapsulating the South Pole.

The Olympic Rings

The Olympic Games is a major international event featuring summer and winter sports, in which thousands of athletes participate in a variety of competitions.


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The Archangel Raphael and Tobias by Titian
The Archangel Raphael and Tobias by Titian

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Narendra Modi
Narendra Modi

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June 10: Dragon Boat Festival in China and Taiwan (2024)

John Diefenbaker
John Diefenbaker
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Oblique shock

An oblique shock is a shock wave that, unlike a normal shock, is inclined with respect to the direction of incoming air. It occurs when a supersonic flow encounters a corner that effectively turns the flow into itself and compresses. This photograph shows an oblique shock at the nose of a Northrop T-38 Talon aircraft, made visible through Schlieren photography.

Photograph credit: NASA & US Air Force (J.T. Heineck, Ed Schairer, Maj. Jonathan Orso, Maj. Jeremy Vanderhal)

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