Ecology and Environment
A New Perspective on Our Planet
The same curiosity that allowed humanity to understand astronomical phenomena now offers us a striking insight into what is happening right before our eyes, here on our spaceship Earth. By observing the universe, we have learned to measure the fragility and uniqueness of our own world.
A Macro-Organism Out of Balance
The "macro-organism" Earth is showing signs of fever, and humanity is growing concerned. Floods, storms, tsunamis, and earthquakes fuel a rising anxiety. These natural phenomena, amplified by human activities, remind us that our environment reacts to the pressures we place on it.
Understanding to Act Better
Studying ecology and the environment means seeking to understand the mechanisms that govern natural balances, as well as the disruptions we introduce. This section explores the issues, phenomena, and dynamics that shape our planet, in order to better grasp the ecological challenges we collectively face.
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The Paleocene-Eocene Transition: When Earth's Climate Suddenly Changed
The Principle of Least Action: Why Does Nature Always Choose the Most Economical Path?
Evolutionary Convergence: Chance, Necessity… or Mirage?
The Five Mass Extinctions: What do these planetary catastrophes reveal?
Cryosphere: when the ice giants still protect us
The Nitrogen Cycle: From Air to Life
The Jet Stream: When the Atmospheric River Overflows Its Banks
The Carbon Cycle: The Harmonious Interaction of Oceans, Forests, and Subsoils
The Water Paradox: Without it, no life
Why did alternating current prevail? 
Evolution of Global Energy Consumption: From Steam Engines to Digital Servers
The Demographic Transition: Growth or Decline?
Lake Agassiz: A Deluge that Changed the Climate
Drunken Forests: Understanding the Phenomenon of Permafrost Thaw
There is Electricity in the Air!
Why Doesn't CO2 Fall to the Ground?
El Niño and La Niña: the two climatic phenomena of the Pacific
Endangered Species: Dynamics of Extinction
The Toxic Legacy of Acid Rain
Major societal collapses: key periods and causes
Global Warming in Figures: What the Scientific Data Says
What is Sustainable Development?
The Hottest Years Since Records Began
Magnitude of upcoming climate change
Earth in Crisis: Collapse or Renaissance?
Ice on Borrowed Time: The Inexorable Decline of Arctic Sea Ice
Earth's Water Reservoirs: From Oceans to Groundwater
Sea Levels Are Rising, But How Fast?
The Other Climate Threat: Earth Shrouded in Shadow and Humidity
The Age of the Sahara: From Green Prairie to Stone Desert
World Population from 1800 to 2100
Oil: The Fall of a Giant in the Era of Renewable Energy
Kamchatka King Crab: A Giant of the Oceans
The collapse of a society
Slight Progress in the Global Ecological Footprint
The South Atlantic Anomaly
The phenomenon of soil sinking is called subsidence
The Planet's New Clouds