In 1815, Mount Tambora erupted and its emissions spread across the globe, blotting out the sun for almost an entire year. This wreaked havoc on agriculture, leading to famines all across the Northern hemisphere. It was the year without summer— one of the darkest periods in human history. So why are some modern researchers considering repeating it? David Biello digs into geoengineering. [Directed by Léon Moh-Cah, Andi Concha, Na Na Na Studio, narrated by Addison Anderson, music by Stephen LaRosa].

David Biello: 1816: The year with no summer

1816: The year with no summer

Mount Tambora's 1815 eruption, the largest recorded, plunged the world into a year without summer, sparking famines and unrest.

Despite the risks, such as unpredictable climate changes, researching geoengineering is vital as climate change escalates.

Geoengineering might be civilization's last resort in combating climate change, mirroring effects from historical volcanic eruptions.