Explore the history and science of climate change in this comprehensive 90-minute lecture by theoretical physicist and glaciologist R Shankar. Delve into the discovery of past climate changes, the greenhouse effect, and the role of human activities in global warming. Examine paleoclimatology techniques, including ice core analysis, and learn about the development of climate models. Understand the current status and future predictions from the IPCC's AR6 report, and consider the ethical and political implications of climate change. Gain insights into tracking global efforts through the Keeling curve and participate in a Q&A session to further your understanding of this critical global issue.