Many of us enjoy cooking – but when did we switch from eating our food raw, to heating it? Listener Logan enjoys his beef burgers rare, but wants to know why he still feels compelled to grill them? Presenter Anand Jagatia travels to a remote South African cave where our ancestors first used fire at least a million years ago, which one man says could help prove when our species started cooking. And he talks to a scientist who shows how the composition of food changes when it’s cooked, to allow us more access to give us more access to calories - and hears how a completely raw food diet could have disastrous consequences for health.Producer: Marijke Peters
Presenter Anand Jagatia(Image: A large pan held over an open fire. Credit: Getty Images)

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