Thomas Rogers and F. Leland Russell, researchers at Wichita State University, wanted to know if woodland expansion is related to changes in climate.

Thanks to the work done by Thomas Rogers and F. Leland Russell, we now know that droughts may have played a role in woodland expansion.

Wichita State University researchers have determined that tree population growth was associated with dry intervals.

Thomas Rogers and F. Leland Russell analyzed core samples from oak trees on a site that was not wooded in the past, indexing the age of the trees with historical climate data.

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Canadian paleobiological Natalia Rybczynski's fossil has the skull and teeth of a seal, which, like sea lions and walruses, is a pinniped.

Pinnipeds are descended from four-legged, land-dwelling carnivores; a fossil that resembles both was recently found.

Having four legs but the skull and teeth of a seal, the rare fossil illustrates an early stage in the evolution of pinnipeds from their land-dwelling ancestors.

A "transitional fossil" was recently found by paleobiological Natalia Rybczynski.

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