Scientists are using a UC Santa Cruz greenhouse to recreate the mass extinction that wiped out the dinosaurs. They want to learn why some species survived when so many did not.
The La Brea Tar Pits were recognized as one of the world’s First 100 IUGS Geological Heritage Sites for their stunning Ice Age fossil record.“With the blechnum, what we saw was more of a cringy, slow loss of the leaves,” Baer said. “It appeared like it was sort of suffering.”
The first spring-green buds began to emerge alongside the withered brown remains within days of the light’s return. Two weeks later, fern fronds spilled from several pots, and the tiny sequoia and sycamore saplings once again had leaves. Suddenly, Pittermann gasped. There, poking up through the soil, was a tiny green tendril. The blechnum had made it after all, just as its ancestor did 66 million years ago.
“They actually have a special type of photoreceptor that flowering plants and other seed plants do not have, so they’re able to photosynthesize in really low light conditions,” Sessa said. Ferns are also tolerant of acidic and nutrient-poor soils, and some species can absorb heavy metals from contaminated soil, in effect cleaning the earth with their presence.
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