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A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England

Inventors and Inventions of the Industrial Revolution

World Data Locator Map: Australia

Is Australia an Island?

Adolf Hitler (Nazi, nazism, German leader).

9 Things You Might Not Know About Adolf Hitler

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Panoramic view at sunrise of moai, Ahu Tongariki, Easter Island (Rapa Nui), Chile

6 Lost Civilizations

Black widow spider

9 of the World’s Deadliest Spiders

Martin Luther King, Jr.

Why We Celebrate MLK Day

silk

in sapphires

Learn about this topic in these articles:

result of sapphire inclusions

In sapphire
…faint whitish sheen, known as silk. Tiny, regularly arranged mineral inclusions (commonly rutile) and elongate cavities are responsible for the asterism shown by star sapphire.
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