A Foulden fossil leaf magnified 400x.

The oval shapes visible in the image are the openings through which the leaf once released water and absorbed carbon dioxide.

Credit: Tammo Reichgelt/University of Connecticut

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

• Original image (1.1 MB, 2592.0x1944.0 px)
• Preview image (388.8 KB, 1280x960 px, JPEG format)

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