Phanerozoic Eon 11.8% Earth history earlier eons

The best-known part of Earth's history is only a small slice of it

The Phanerozoic Eon, which contains most familiar animal and plant fossils, covers only about 11.8% of Earth's history. The three earlier eons make up the other 88.2%. They often receive less attention partly because much less evidence from those ancient times survives.

Expert Morse operators can copy messages while talking

Highly trained Morse code operators have been able to copy incoming messages accurately while having a conversation at the same time. With enough practice, a difficult skill can become automatic enough to need much less attention.

Crops moved both ways along Central Asian routes

In the Bronze Age, farming and herding communities used foothills and areas fed by melting glaciers to build east–west trade routes. Wheat and barley traveled to China, while millet reached Central Asia.

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Phanerozoic Eon 11.8% Earth history earlier eons

The best-known part of Earth's history is only a small slice of it

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