Watch Modern Marvels Season 17 Episode 5 Online
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- COUNTRIES: United States of America
- Subtitles: English
Man's best friend–fearless, faithful, determined and swift. They're our sharpest eyes, noses and ears–and among the bravest hunters, soldiers, rescuers, and protectors. From natural instincts to complex training, see what makes dogs a perfectly engineered Modern Marvel.