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If you’ve ever watched a frog eat prey, you’ve probably noticed that they close their eyes when swallowing. Scientists x-rayed frogs as they consumed crickets to discover what happens. The x-rays showed that the frog’s eyes don’t only close as they swallow, they retract down towards the esophagus. During swallowing the eyes appear to touch […]
Zinc is an important mineral for both humans and animals to maintain good health. But zinc is necessary only in very small amounts. Ingestion of excessive amounts of zinc can lead to poisoning. Zinc becomes toxic when released by stomach acids. It is then absorbed and travels to other parts of the body such as […]
