How solid is the 450-million-year shark date?

The 450-million-year figure rests on tiny shark-like scales from the Ordovician period, which scientists debate. The oldest undisputed shark teeth are about 410 million years old — still millions of years before the first trees.

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Are Sharks Really Older Than Trees?

Q: What counts as the first tree?

A true tree is a tall plant with a woody trunk that lifts its leaves above competitors — the kind that formed the first forests in the Devonian period, about 385 million years ago.

Yes. Sharks appeared roughly 450 million years ago, and the first true trees didn't evolve until about 385 million years ago — sharks were already tens of millions of years old, and had already survived mass extinctions, before the first forest grew.

Quick facts

Sharks' debut: about 450 million years ago (earliest evidence: shark-like scales)
Oldest undisputed shark teeth: about 410 million years old
First true trees: about 385 million years ago
The gap: sharks predate trees by roughly 65 million years
When sharks appeared, the tallest land plants were mosses a few centimeters high

An ocean full of sharks, a land with no trees

Picture Earth 450 million years ago. The oceans are busy and full of early sharks. The land, though, is nearly empty — a rocky shore world of mosses and liverworts hugging the ground, nothing taller than your ankle. There would be no forests for tens of millions of years yet. Sharks didn't just come before trees; they came before trees were even an idea evolution had tried.

What counts as the first tree?

A "true tree" means a tall plant with a woody trunk that lifts its leaves above competitors — the kind that formed the first forests in the Devonian period, about 385 million years ago. Plants existed on land long before that, and earlier plant-like experiments got partway there, but the forest as we know it waited for the trunk. By then, sharks had body plans so successful that some early forms look recognizably like the sharks swimming today.

The fine print on the dates

The 450-million-year figure rests on tiny shark-like scales from the Ordovician period, and scientists debate exactly what animal they came from. The oldest shark teeth nobody argues about are about 410 million years old. Either way the headline survives the fine print: even on the most conservative date, sharks beat trees by millions of years — and then outlasted every one of the five big mass extinctions that followed.

Watch it

See the short version in the LOE PRESSURE "Things You Didn't Know" series — "Sharks Are Older Than Trees."

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Keep learning

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Fascinating facts you didn't know. Come learn with me — no pressure.

Sources: Natural History Museum shark-evolution timeline, via SpaceDaily — https://spacedaily.com/d-sharks-have-been-swimming-in-earths-oceans-for-roughly-450-million-years-which-means-they-predate-the-first-tree-by-about-65-million-years-and-when-sharks-first-appeared-the-only-plants-on-land-were-mosses-and-liverworts-no-taller-than-a-few-centimetres; Shark Sider, "Are Sharks Older Than Trees?" — https://www.sharksider.com/are-sharks-older-than-trees/. Verified 2026-10-12 in week-facts-research.md.