Fossil plants reveal the evolution of green life on Earth, but the most abundant samples that are found -- fossil leaves -- are also the most challenging to identify. A large, open-access visual leaf ...
In fossil leaves, puzzling structures are often visible under the microscope. Researchers have now been able to show for the first time that they originate from calcium oxalate crystals. On the one ...
UNIVERSITY PARK, Pa. — How far would leaf-eating insects go to dine on their favorite food? Perhaps the other side of the world, according to researchers at Penn State who found insect damage on ...
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