How Did Mammals Evolve?

An introduction to the ‘mammal-like reptiles’ that walked the Earth millions of years before the dinosaurs – and from which all modern-day mammals would eventually evolve.

Biology - Animal Kingdom - Learning Points.

Early reptiles split into two evolutionary branches: sauropsids, or "true reptiles", and synapsids, or "mammal-like reptiles".

Dimetrodon and other sail-backed synapsids could maintain a steady body temperature by controlling blood flow to their sails.

Mammals evolved from a group of synapsids called the therapsids.

While most mammals evolved to give birth to live young, some continue to lay eggs.
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