Why do we need glasses?

Why is there traffic? How do traffic lights work? How do they know when to turn red and green? Why does green mean go and red mean stop? Why are cars able to go faster than they are allowed to go with the speed limit? Why do we drive on the right side of the road in the United St ...  Show more

Can’t get enough of lizards? We’re back with a bonus episode answering more of your lizard questions with Adam Clause of the San Diego Natural History Museum. This week, chameleons, Komodo dragons, iguanas, monitor lizards and tuatara! How do chameleons change color? Why are Komo ...  Show more

"Over half of Americans wear corrective glasses or contact lenses. While there isn’t a shortage of low-cost and luxury frames available online or in stores, consumers can only buy them with a current eyeglass prescription. That means that they first need an eye exam from an optom ...  Show more

Have you ever woken up in the morning with the corners of your eyes filled with crud? Sleepy sand? Eye goblins? Dozy dust? Bed boogers? Why do our eyes make this stuff, anyway? And why does it build up when we’re asleep? We asked Yale eye doctor Soshian Sarrafpour to help us get ...  Show more

Unser Mitglied Palin hat sich gewünscht, dass wir einmal über Brillen und Kontaktlinsen sprechen. Wir starten mit den Erinnerungen an unsere ersten Brillen und erklären den Unterschied zwischen Augenarzt und Optiker. Manuel erzählt, warum er Brillen lieber online kauft, auf we ...

How does reading work in the brain? It’s a question that has fascinated scientists for years. Could braille - the system of raised dots that blind and low vision people use to read - be the key to understanding how it works? We talk to writer Andrew Leland (“The Country of the Bl ...  Show more