Course subject

Science courses

4 Science courses, including Principia Mathematica, Relativity: The Special and General Theory and On the Origin of Species. Each is structured into chapters, lessons and tests, and comes with a 24/7 tutor you can video call, speak to or chat with.
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Every Science course

Narrow it by topic, level or length — every course opens with a free first chapter.

Principia Mathematica

Cavua Seed Library

Principia Mathematica

PhysicsAdvanced

52chapters17h 48m

This course was produced by Cavua from a public-domain text.

With membership

Or preview chapter 1 free

Updated Oct 2026

Relativity: The Special and General Theory

Cavua Seed Library

Relativity: The Special and General Theory

PhysicsAll levels

12chapters2h 6m

This course was produced by Cavua from a public-domain text.

With membership

Or preview chapter 1 free

Updated Oct 2026

On the Origin of Species

Cavua Seed Library

On the Origin of Species

BiologyAll levels

24chapters10h 30m

This course was produced by Cavua from a public-domain text.

With membership

Or preview chapter 1 free

Updated Oct 2026

Experiments on Plant Hybridization

Cavua Seed Library

Experiments on Plant Hybridization

BiologyAll levels

12chapters4h 18m

This course was produced by Cavua from a public-domain text.

With membership

Or preview chapter 1 free

Updated Oct 2026

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