2 A 23-million-year-old leaf preserved in an ancient New Zealand lake bed provides a key to past atmospheric conditions.

Veins, glands along the pointed teeth, and holes that insects gnawed are all visible.

Credit: Jennifer Bannister/University of Otago

• Fossil leaves point to global greening in the coming decades (20 August 2020)

• Original image (5.2 MB, 3056.0x4592.0 px)
• Preview image (86.9 KB, 1280x1923 px, JPEG format)

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