Where Did Plants Come From? This Ancient Algae Offers Clues
Around 500 million years ago—when the Earth was already a ripe 4 billion years old—the first green plants appeared on dry land. Precisely how this occurred is still one of the big mysteries of evolution. Before then, terrestrial land was home only to microbial life. The first green plants to find their way out of the water were not the soaring trees or even the little shrubs of our present world. They were most likely soft and mossy, with shallow roots and few of the adaptations they would later evolve…
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