Cave pearls form when water drips onto a grain of sand, depositing concentric layers of calcite over thousands of years.
Fact #7417
👍 0 · 👎 0
More Nature Facts
Some dinosaurs laid eggs in large nesting colonies.
Fact #679 · Nature
The sea turtle’s streamlined shell aids in efficient swimming.
Fact #903 · Nature
Cactus spines reduce water loss and protect against herbivores.
Fact #863 · Nature
The Carboniferous period had vast swamp forests.
Fact #691 · Nature
Jellyfish have existed for hundreds of millions of years.
Fact #117 · Nature
The ozone layer is located in the stratosphere.
Fact #140 · Nature
Some trees can communicate with each other using underground fungal networks.
Fact #1826 · Nature
The snowshoe hare changes fur color with the seasons for camouflage.
Fact #871 · Nature
Want more facts?
We have over 11,491 facts across 15 categories.