1816 was a remarkable year - mostly for the fact that there was no summer. As a result of a volcanic eruption at Mount Tambora in Indonesia, weather patterns were disrupted worldwide for months, allowing for excessive rain, frost, and snowfall through much of the Northeastern US and Europe in the summer of 1816.  

When Indonesia's Mount Tambora erupted in 1815, it unleashed the most destructive wave of extreme weather the world has witnessed in thousands of years. The volcano's massive sulfate dust cloud enveloped the Earth, cooling temperatures and disrupting major weather systems for more than three years. Amid devastating storms, drought, and floods, communities worldwide endured famine, disease, and civil unrest on a catastrophic scale.

In the summer of 2022, Lee Berger lost 50 pounds in order to wriggle though impossibly small openings in the Rising Star cave complex in South Africa—spaces where his team has been unearthing the remains of Homo naledi, a proto-human likely to have coexisted with Homo sapiens some 250,000 years ago. Lead researcher Berger had never made his way into the dark, cramped, dangerous underground spaces where many of the naledi fossils had been found. Now he was ready to do so. Once inside the cave, Berger made shocking new discoveries that expand our understanding of this early hominid.

Before 1862, Joshua Lawrence Chamberlain had rarely left his home state of Maine, where he was a trained minister and mild-mannered professor at Bowdoin College. His colleagues were shocked when he volunteered for the Union army, but he was undeterred and later became known as one of the North’s greatest heroes: On the second day at Gettysburg, after running out of ammunition at Little Round Top, he ordered his men to wield their bayonets in a desperate charge down a rocky slope that routed the Confederate attackers.

The history of the Great Warming of a half millennium ago suggests that we may yet be underestimating the power of climate change to disrupt our lives todayand our vulnerability to drought, writes Fagan, is the silent elephant in the room.