Blue

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873 published items.

The reason the sky at sunset is red
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The reason the sky at sunset is red

The phenomenon of light scattering in the atmosphere causes the sky to be blue during the day but turning red at sunset.

December 18, 2018
Lizard catches insects on trees
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Lizard catches insects on trees

The agama lizard continuously swallowed two prey in Marakele National Park, South Africa, reported Latest Sightings on June 26.

December 18, 2018
Why is our blood red, but not green?
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Why is our blood red, but not green?

Human blood is red because of red blood cells, containing hemoglobin. This is a protein that contains a red compound called heme, which is very important in transporting…

December 18, 2018
Where does sand in the sea come from?
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Where does sand in the sea come from?

Formed by the changes in weather and erosion of mountains as well as over millions of years, grains of sand flow along the rivers to the sea.

December 18, 2018