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¿Hablas español? Parlez-vous français? 你会说中文吗？ If you answered, “sí,” “oui,” or “会” and you’re watching this in English, chances are you belong to the world’s bilingual and multilingual majority. And...
Since the launch of the first artificial satellite in 1957, governments, companies, and research institutions have been planting flags among the stars. But while it might seem like there’s plenty...
Every two seconds, someone somewhere in the world experiences a stroke. And one out of every six people will have one at some point in their lives. Strokes deprive brain...
You may take them for granted, but your teeth are a marvel. They break up all your food over the course of your life, while being strong enough to withstand...
This is a song sung by a brown thrasher. But that’s just one of the thousand or more that it knows, and it’s not the only avian virtuoso. A wood...
In order to become a butterfly, a caterpillar’s body dissolves almost completely and is rebuilt from its own juices. As inconvenient and even downright dangerous as this process sounds, it’s...
Between you and the rest of the world lies an interface that makes up 16% of your physical weight. This is your skin, the largest organ in your body: laid...
The year is 15 CE and the Roman Empire is prospering. Most of the credit will go to the emperor, but this success wouldn’t have been possible without loyal soldiers...
In ancient Greece, headaches were considered powerful afflictions. Victims prayed for relief from Asclepius, the god of medicine. And if pain continued, a medical practitioner would perform the best-known remedy—...
Imagine you’re being attacked by a ferocious predator. With no chance of escape, you do what any courageous, self-respecting possum would do: curl into an immobile state called catatonia, stick...
