cirrus

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Observe subadult cypris and adult barnacles using cirri retractile organs to collect food particles

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Statue of Nostradamus

Nostradamus and His Prophecies

green digital binary symbols

What Comes After Terabyte?

Close up of praying mantis walking on stone ground against a blurred background in Japan

6 Animals That Eat Their Mates

Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

All 119 References in “We Didn’t Start the Fire,” Explained

Flags of the countries of the world (flagpoles).

How Many Countries Are There in the World?

Nelson Mandela, undated photo.

15 Nelson Mandela Quotes

Mona Lisa, oil on wood panel by Leonardo da Vinci, c. 1503-06; in the Louvre, Paris, France. 77 x 53 cm.

Why Is the Mona Lisa So Famous?

cirrus

cirripede organ

Learn about this topic in these articles:

anatomy of barnacles

In barnacle
…of food by means of cirri—feathery retractile organs formed by metamorphosis of certain of their swimming legs.
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