streetspirit Towering fan palms and early crocodilians frame a calm Arctic freshwater lake.
What microscopic leaf structures do paleobotanists count to estimate ancient atmospheric carbon dioxide levels?
In what substance are the shells of foraminifera made, which preserves ancient chemical clues?
streetspirit Sort fossil clues to discover how Earth survived extreme climate shifts before humans existed.
streetspirit Foraminifera fossils reveal millions of years of ocean temperature shifts.
Fossils of which plants found on Ellesmere Island prove the Arctic was once subtropical?
What microscopic, single-celled organisms with shells are used by scientists to measure ancient ocean temperatures?
streetspirit Ancient Climates and Changing Worlds
In the cold of Alaska, they found a fossil palm / Long before we were here, the frozen north was warm
streetspirit Paleobotanists reconstruct Earth's ancient atmosphere using fossilized leaves.
streetspirit Fossilized leaves reveal historic carbon dioxide levels through their microscopic pores.
From which regions does the Smithsonian's woolly mammoth collection primarily originate?
During which epoch, starting 56 million years ago, did the Arctic experience a warm, ice-free climate?
Giant penguins: Fossil records at the Smithsonian show that 37 million years ago, giant penguins grew up to six feet tall.
How do plants respond to higher levels of carbon dioxide in the atmosphere over generations?
What physical adaptation helped woolly mammoths survive the extreme cold of the Pleistocene ice ages?
