Although it is certainly correct that all sea urchins live in the sea, not all urchins have five-fold symmetry. In fact, not all urchins are rounded either. This is an academic reference book about ...

Have you ever gazed at a starfish gliding across the ocean floor and thought, “That’s basically my distant cousin!”? Probably ...

This mission marks the first time that space regeneration experiments with flatworms will be conducted in mainland China, opening new avenues for understanding biological processes in space. Flatworms ...

Earth’s history is filled with incredible milestones, and the emergence of the first animals is one of the most captivating.

The same study found significant symmetry between the eyes in the size and growth rate of GA lesions, with an inter-eye correlation coefficient of 0.88. Unilateral and bilateral GA cases had ...

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This suggests a greater-than-expected breaking of isospin symmetry between up and down quarks, challenging current theoretical models that predict only minor deviations.

Plates in the test are arranged into columns radiating from an aboral apical zone to the mouth. In regular echinoids the test is globular and perfectly pentaradiate, but in irregular echinoids there ...

The current consensus, therefore, leans toward classifying Dickinsonia as an animal. More specifically, it may have been an ...

Pope Francis passed away at 88 due to complications from bilateral pneumonia, a severe lung infection affecting both lungs. It has put a spotlight on an illness that often goes unnoticed until it ...