Why can squid squirt ink?
Squids have a “ink sac” inside their bodies, filled with ink. When we cut them open with a knife, the ink flows out, staining everything in deep black. This is …
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Why can some shellfish grow among rocks?
Birds and mammals, as well as fish, shrimp, and insects, are generally powerless against rocks. However, there are several types of marine mollusks that possess a remarkable ability to bore …
Why does an ant die when you put a little salt on it?
The leech, also known as a water leech, has a sucker at both ends of its body. When it feeds on blood, these suckers tightly attach to the skin of …
Do earthworms have lungs?
Higher vertebrates such as horses, cattle, and sheep breathe using lungs. Among fish, except for lungfish which have primitive lungs, others primarily use gills for respiration. Earthworms, being lower animals, …
Why do wooden ships sailing on the sea get infested with woodworms?
Some fishermen’s newly acquired wooden boats, after only a few months at sea, are riddled with holes on the hull and become unusable. Is it the work of termites? But …
Why does the ocean sometimes glow?
For a long time, there have been widespread stories about bioluminescence in the ocean, which ancient people referred to as “sea fireflies.” The ocean indeed exhibits bioluminescence at times; when …
Why could ancient apes evolve into humans, but modern great apes cannot evolve into humans?
Humans are descendants of ancient apes, a fact widely accepted today. How did humans evolve? First and foremost, humans are creatures of intelligent labor. Intelligent labor differs significantly from instinctual …
Why can monkeys eat voraciously?
When people eat, they shouldn’t gulp down their food hastily because it increases the burden on the stomach, leading to indigestion and impacting health. However, in zoos, when we observe …
Why do monkeys like to pick fleas off their companions?
When the weather is fine and sunny, monkeys lounging in the sun often have another monkey meticulously picking at their fur as if catching “fleas”, with nimble and realistic movements …
Why are monkeys good at imitating?
In zoos, we often see young monkeys in monkey mountains or monkey enclosures imitating the behaviors of adult monkeys. In circuses, monkeys can play drums and cymbals, direct goats in …