வீடியோ விளக்கம்
When people think of the fastest animals, most consider running cheetahs, flitting hummingbirds, or jumping kangaroos. But there's a level above what we think of as "fast": Ultrafast organisms conserve energy and move in nano- or even micro-seconds.
சேர்க்கப்பட்டது
27 ஏப் 2018