"Cold Knowledge of Biology" is an interesting popular science book on biological knowledge. The book covers many biological wonders, such as why mosquitoes prefer sweet liquids, the mystery of fireflies' glow, the mystery behind the sound of dolphins, and the real reason why moths fly into the flames. It also reveals the truth behind some of the animals' seemingly bizarre physical features: Are red-crowned cranes bald? Giraffes use their tongues to clean their ears? The pink mystery of flamingos…
