In ‘Mama’s Last Hug,’ Frans de Waal argues that emotions occur throughout the animal world.
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Most elements on the periodic table have at least one stable form. But some don’t. Here’s how long those unstable members endure.
In the 1960s, people blamed monosodium glutamate in Chinese food for making them sick, but the claim hasn't stood up to time or science.
The hunt for the next elements on the periodic table might turn up superheavy atoms that flaunt the rules of chemistry.