Millions of years ago, animals adapted to become warm-blooded amid huge climactic changes. Now scientists hope these clues from the past could help us understand what lies ahead
In Chicago’s Field Museum, behind a series of access-controlled doors, are about 1,500 dinosaur fossil specimens. The palaeobiologist Jasmina Wiemann walks straight past the bleached leg bones – some as big as her – neither does she glance at the fully intact spinal cord, stained red by iron oxides filling the spaces where there was once organic material. She only has eyes for the deep chocolate-brown fossils: these are the ones containing preserved organic matter – bones that offer unprecedented insights into creatures that went extinct millions of years ago.
Wiemann is part of the burgeoning field of conservation palaeobiology, where researchers are looking to the deep past to predict future extinction vulnerability. At a time when humans could be about to witness a sixth mass extinction, studying fossil records is particularly useful for understanding how the natural world responded to problems before we arrived: how life on Earth reacted to environmental change over time, how species adapted to planet-scale temperature changes, or what to expect when ocean geochemical cycles change.
