https://youtu.be/tB5-JahAXfc When you look at this photo, do you see Marilyn Monroe or Albert Einstein? This strange illusion makes for an interesting eye test and it has nothing to do with col…174 comments
Patients recovering from an injury have a hard time sticking with repetitive physical therapy exercises. What if a video game could help them heal? Cosmin Mihaiu calls physical therapy "boring," …55 comments
Do you feel old? It turns out that many 100-year-olds don't. Those who do say they didn't start to feel old until they hit their 80s. And they didn't look back on childhood as the happiest time of the…237 comments
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