Metal mouth – Komodo dragons’ teeth found to have a sharp iron coating

As if Komodo dragons didn't seem ferocious enough already, scientists have now discovered that the reptiles tear through flesh using a coating of iron on their teeth. It is now believed that dinosaurs such as T. rex may have been similarly endowed.

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Fruit: A secret weapon against age-related depression

If an apple a day keeps the doctor away, then a new study says upsizing to a fruit salad is even better – by drastically lowering the risk of age-related depressive symptoms. It's the latest in a growing body of evidence linking fruit and mental health.

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