Foulden Maar, an extinct volcanic crater near Dunedin, New Zealand.

Surface excavation (on right) and drilling in 2009 (left) unearthed tens of thousands of fossils, including fish, spiders and sucking bugs as well as dozens of plant species.

Credit: Credit: Daphne Lee/University of Otago

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

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