- dinosaurs lived on Earth for over 165 million years before they became extinct
- dirty snow melts quicker than clean snow
- Disneyland opened in 1955
- DNA stands for Deoxyribonucleicacid
- dogs sweat through the pads on their feet
- dolphin's can detect underwater sounds from 24 km (15 miles) away
- dolphins can kills sharks by ramming them with their snout
- domestic cats dislike citrus scents
- dragonflies have 6 legs but can't walk
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