What will I learn about: how studying the interconnected prehistoric history of plants, animals, and the climate prepares us to tackle our current environmental crises?

Discover how studying the interconnected prehistoric history of plants, animals, and the climate prepares us to tackle our current environmental crises.

What will I learn about: Learn how a massive drop in atmospheric carbon dioxide 375 million years ago forced plants to develop larger leaves, paving the way for an evolutionary boom in animal species?

Learn how a massive drop in atmospheric carbon dioxide 375 million years ago forced plants to develop larger leaves, paving the way for an evolutionary boom in animal species.

What will I learn about: how plants actively manipulate the planet's long-term carbon cycle by adjusting their microscopic leaf pores in response to changing atmospheric conditions?

Understand how plants actively manipulate the planet's long-term carbon cycle by adjusting their microscopic leaf pores in response to changing atmospheric conditions.

What will I learn about: why a massive spike in oxygen levels and atmospheric pressure 300 million years ago led to the supersized growth of ancient plants and giant insects?

Find out why a massive spike in oxygen levels and atmospheric pressure 300 million years ago led to the supersized growth of ancient plants and giant insects.

What will I learn about: Explore how the destruction of the stratospheric ozone layer 250 million years ago caused history's largest mass extinction and triggered rapid genetic mutations in surviving plants?

Explore how the destruction of the stratospheric ozone layer 250 million years ago caused history's largest mass extinction and triggered rapid genetic mutations in surviving plants.

The Emerald Planet

How Plants Changed Earth's History

David Beerling

★ 4.5 / 5(45 ratings)

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Science Nature & the Environment

If You're Curious About These Questions...

You should listen to this audiobook

💡Did you know that the evolution of simple leaves actually triggered a massive, planet-wide shift in Earth's climate?
💡Have you ever wondered how fossilized plants can act as a 'time machine' to reveal the true causes behind our planet's greatest mass extinctions?
💡Are you curious about how the hidden power of plants has actually dictated the course of animal evolution and the very air we breathe today?

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Key Takeaways from The Emerald Planet

✓Discover how studying the interconnected prehistoric history of plants, animals, and the climate prepares us to tackle our current environmental crises.
✓Learn how a massive drop in atmospheric carbon dioxide 375 million years ago forced plants to develop larger leaves, paving the way for an evolutionary boom in animal species.
✓Understand how plants actively manipulate the planet's long-term carbon cycle by adjusting their microscopic leaf pores in response to changing atmospheric conditions.
✓Find out why a massive spike in oxygen levels and atmospheric pressure 300 million years ago led to the supersized growth of ancient plants and giant insects.
✓Explore how the destruction of the stratospheric ozone layer 250 million years ago caused history's largest mass extinction and triggered rapid genetic mutations in surviving plants.

Learning Tools

Reinforce what you learned from The Emerald Planet

Mind Map

The Emerald Planet

Leaves & CO2 (375M years ago)+

Oxygen & Gigantism (300M years ago)+

Ozone & Mass Extinction (250M years ago)+

Global Warming & Dinosaurs (200M years ago)+

Deciduous Polar Forests+

Greenhouse Hothouse (50M years ago)+

C4 Photosynthesis (30M years ago)+

Quiz — Test Your Understanding

Question 1 of 7

Why did plants evolve to have larger leaves approximately 375 million years ago?

A. To absorb more sunlight in increasingly cloudy climates.
B. To cope with a significant decrease in atmospheric carbon dioxide.
C. To protect themselves from newly evolved herbivorous insects.
D. To increase oxygen production during the Carboniferous Period.

Question 2 of 7

What environmental factor primarily contributed to the supersizing of insects and plants during the Carboniferous Period?

A. A dramatic spike in atmospheric oxygen levels.
B. A massive increase in global temperatures.
C. The absence of large land-dwelling predators.
D. The destruction of the ozone layer.

Question 3 of 7

During the Permian mass extinction, how did lycopsids manage to survive and colonize new ground while other plants died out?

A. They developed deeper root systems to reach underground water.
B. They evolved smaller leaves to retain moisture in extreme heat.
C. They underwent a mutation that allowed for asexual reproduction.
D. They migrated to the oceans to escape ultraviolet radiation.

Question 4 of 7

What evidence from plant fossils collected in Greenland pointed to global warming as the cause of the late-Triassic extinction?

A. A reduced number of stomata on fossilized leaves, indicating high CO2 levels.
B. The presence of volcanic ash embedded within the leaf structures.
C. Increased leaf size, suggesting an adaptation to extreme heat.
D. A sudden shift from C3 to C4 photosynthetic pathways.

Question 5 of 7

Why did deciduous trees outcompete evergreen trees in ancient northern polar forests?

A. They conserved energy during the winter by going completely dormant.
B. They grew faster during warm Arctic summers and recovered quickly after frequent forest fires.
C. Their broad leaves were better equipped to handle heavy snowfall.
D. They were more resistant to the high levels of ultraviolet radiation at the poles.

Question 6 of 7

What do scientists now believe was the primary cause of the extremely mild polar temperatures 50 million years ago?

A. Changes in how water circulated around the Earth's oceans.
B. The Pacific Ocean absorbing more atmospheric heat.
C. A massive asteroid impact that trapped heat in the atmosphere.
D. A feedback loop created by a combination of multiple greenhouse gases.

Question 7 of 7

What evolutionary advantage do C4 plants have over C3 plants in low carbon dioxide environments?

A. They can switch to consuming soil nutrients instead of photosynthesizing.
B. They avoid accidentally capturing oxygen molecules, which squanders energy.
C. They possess larger stomata that can physically trap more CO2.
D. They are completely immune to destruction by forest fires.

The Emerald Planet — Full Chapter Overview

1Recommendation
2Plants evolved leaves to cope with declining carbon dioxide levels, which in turn kick-started long-term animal and insect evolution.
3A surge in oxygen levels enlarged all living organisms.
4Destruction of the ozone layer triggered mass extinctions for some and genetic mutations for others.
5Rising CO2 levels drove global temperatures higher, which caused ancient life to vanish and then dinosaurs to flourish.
6Deciduous trees ruled northern polar forests by growing rapidly and then eventually dying young.
7Fifty million years ago, greenhouse gases warmed the Earth’s surface, producing a climate vastly different from today’s climate.
8An alternative photosynthesis method lets some plants thrive even when CO2 levels are low.

The Emerald Planet Summary & Overview

The Emerald Planet (2007) looks at the central role plants have played in shaping the planet and its environment. New research makes use of plants, both fossilized and living, to explain how the planet got where it is, and where it might go in the future. The Emerald Planet inspired a three-part BBC series called How to Grow a Planet.

Who Should Listen to The Emerald Planet?

Anyone interested in plant biology and paleobotany
People who want to learn more about ancient mass extinctions
Evolutionary science enthusiasts

About the Author: David Beerling

David Beerling is the Sorby Professor of Natural Sciences and Director of the Leverhulme Centre for Climate Change Mitigation at the University of Sheffield, where he researches plant biology and global change. He’s also Editor in Chief of the Royal Society journal Biology Letters. Beerling has written two monographs and many scientific papers; his second book, Making Eden: How Plants Transformed a Barren Planet, was published in 2019.

The Emerald Planet

If You're Curious About These Questions...

Listen to The Emerald Planet — Free Audiobook

Key Takeaways from The Emerald Planet

Learning Tools

Mind Map

Quiz — Test Your Understanding

The Emerald Planet — Full Chapter Overview

The Emerald Planet Summary & Overview

Who Should Listen to The Emerald Planet?

About the Author: David Beerling

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