The Astronomical Records in… Trees?

The video explores how cosmic events, such as supernovae, impact Earth by analyzing carbon-14 levels in ancient tree rings. Cosmic rays from these events create carbon-14, which is absorbed by trees, providing a historical record. Researchers have identified spikes in carbon-14 levels, suggesting significant cosmic events. The video discusses potential causes, like supernovae, and the challenges in dating these events. Understanding these cosmic influences helps assess future risks to Earth.

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