Start here · Essential guide
A Guide to Understanding the Water Cycle
Follow water step by step through evaporation, condensation, precipitation and runoff, and see how the same water keeps moving between sea, air and land.
Earth and Life
Earth and Environment
Water, climate and the living reef.
A Look at the Science Behind Climate Change
How the greenhouse effect warms Earth, why adding carbon dioxide changes the balance, and the independent lines of evidence scientists use to confirm it.
Climate Change: Separating Fact from Fiction
Common climate claims, from cold winters to past natural change, checked against what mainstream science actually says, and where real uncertainty remains.
Facts and Myths About the Great Barrier Reef
What coral reefs are, how the Great Barrier Reef is built and structured, the pressures it faces, and which popular ideas about it are myths.
What Causes Ocean Tides?
How the gravity of the Moon and Sun, together with Earth's rotation, creates the rise and fall of the sea, and why tides differ so much from place to place.
Related topics