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Rubber soul: California’s 6-million-tyre mountain

Canadian photographer Edward Burtynsky explores oil in its industrial and economic context, and its effects on our cultural and social lives

Enigma Number 1698

Feedback: Chemistry without the chemicals

Buzz off

Cell breakdown

Shocking behaviour

Bioluminescent bloom makes beach a magical minefield

Enigma Number 1697

Feedback: Bag that has no size

More on martinis

Sight or flight?

Hellish coal fires roast underworld for a century

Enigma Number 1696

Feedback: The oxygen of terror