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PLANT EVOLUTION
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252.5 Million years ago (+/- 500,000 years)
Pine Needles Evolve
Needle morphology and resin canals
Plant Evolution
By 252 million years ago, needle-like leaves defined conifers, enabling survival and expansion in dry, post-extinction environments. As ecosystems collapsed at the end of the Permian, the plants best suited for drought and instability endured. The needle did not win through spectacle — it won through efficiency.
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Did red algae descend from green algae?
Plant Evolution
Red and green algae diverged about 1.5 billion years ago, shaping marine ecosystems. Green algae later gave rise to land plants around 475 million years ago, transforming Earth’s surface and atmosphere. Fun fact: blue-green algae aren’t algae at all. They’re photosynthetic bacteria that emerged much earlier, around 2.7 billion years ago.
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Pangaea Splitting Starts Splitting Evolution
Evolution
The breakup of Pangaea did not just reshape geography. It reshaped evolution by isolating populations, limiting movement, and allowing different branches of life to follow different paths.
03 Mar 2026
(Updated 1 week ago)
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The P-T Extinction
Evolution
The Permian-Triassic extinction was not just the end of many species. It was a planetary reset that destroyed the old synapsid-dominated world and opened the door for the archosaur line that would later give rise to dinosaurs.
03 Mar 2026
(Updated 1 week ago)
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The K-Pg Extinction
Evolution
Before, during, and after the K–Pg extinction: a thriving Late Cretaceous world of dinosaurs, pterosaurs, birds, and flowering plants gives way to the asteroid strike and global collapse that ended the age of non-avian dinosaurs.
03 Mar 2026
(Updated 1 week ago)
Plant Evolution
From Photosynthesis to Forests
The greening of the planet.
Plant evolution charts the rise of photosynthetic life that reshaped Earth’s atmosphere and made complex ecosystems possible. From early algae to forests and flowering plants, plants transformed climate, soil, and food webs. Understanding plant evolution reveals how life altered the planet long before humans appeared.
