Retracing a Mastodon’s Steps With Chemistry

The video explores the study of mastodon tusks to understand their migration patterns, focusing on a mastodon named Fred. Researchers used strontium and oxygen levels in tusks to track Fred's movements and behaviors, revealing similarities with modern elephants. The video also discusses innovations in vaccine delivery, comparing nasal sprays and inhaled aerosols for respiratory infections. Inhaled aerosols show promise for deeper lung penetration and stronger immune responses, potentially offering a needle-free, efficient vaccination method.

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