Explore the fascinating world of paleoclimatology in this 45-minute AGU conference talk featuring Brian Huber, a climate detective from the Smithsonian. Discover how Huber uses tiny fossilized organisms called foraminifera to reconstruct ancient climates, particularly focusing on the Cretaceous Hot Greenhouse period. Learn about a time when Earth's poles were ice-free, examine the processes of climate change over millions of years, and consider the implications for our planet's future. Gain insights into the scientific methods used to uncover Earth's climatic history and the valuable information hidden within sediment cores.