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Choose a topic and level, then practice at your own pace.
Unit 32 lessons
Green Corridors in Cities
An urban ecology lecture on why connected green corridors matter more to city wildlife than the size of isolated parks.
Urban Heat Island Mitigation
A lecturer explains why cities overheat, why night time temperatures are the real danger, and which remedies actually work.
Unit 82 lessons
Circular Economy Group Project
Two students agree on the scope, methods and deadlines for a group project on the circular economy.
Industrial Symbiosis Lecture
A lecturer explains industrial symbiosis through the Kalundborg case and discusses how its benefits are measured.
Unit 91 lessons
Unit 132 lessons
How Astronomers Detect Exoplanets
A lecture surveying the main indirect methods used to discover planets orbiting distant stars.
DNA Replication and Its Proofreading Machinery
A lecturer describes how cells copy DNA accurately and correct errors during replication.
Unit 182 lessons
Reconstructing the Indo-European Family
A lecture tracing how linguists reconstructed a vanished ancestor language by comparing its daughter tongues.
Deciphering Linear B
A lecture on how an amateur architect cracked the Linear B script through patient statistical analysis.