Gathering for the holidays might seem self-explanatory — but according to Priya Parker, assuming the purpose of an event is obvious misses a chance to address what you and your guests actually need. Here’s how to add more meaning and connection this season: http://t.ted.com/iTyCitX | TED

How your digestive system transforms the food you eat into the nutrients and energy that keep you alive: | TED-Ed

On Edwin Hubble's birthday, here's what we can learn about the immense scale of our universe from the Hubble Deep Field images: | TED-Ed