Grandmother patiently kept an eye on the flame for me, until I finally learned how.

I bet most of us have experienced at some point the joys of less: college -- in your dorm, traveling -- in a hotel room, camping -- rig up basically nothing, maybe a boat.

A girl was trying to remember what red blood cells do, and she drew this little picture of a red blood cell carrying a handbag with O2 on it to remind her that the red blood cells carry oxygen to all parts of the body.

He moved me, and I wanted to hurt him, or at the very least, run after him and yell in his face."

That fury that my friend felt holds centuries of never being able to directly address or express our indignation, our frustration and our rage.

(Laughter) Usman, the official story is that you learned to play the guitar by watching Jimmy Page on YouTube.

Really, we wanted to know if bees can also adapt themselves to new situations using previously learned rules and conditions. So what if bees can think like us?

We were less interested in whether students can simply reproduce what they have learned in school, but we wanted to test whether they can extrapolate from what they know and apply their knowledge in novel situations.

And so here, for example, if I have six different arm movements that I want you to learn, you come into my lab at Penn and try out our system.

Now, that's probably making some folk in this room uncomfortable, because that idea is associated with the extreme left wing and with fairly radical schemes for redistributing wealth.

You know, there's this little child who can't see, can't really understand much about the world, has no one in the family who plays an instrument, and yet he taught himself to play that.

He then explained the tonal differences between male and female voices are very different and distinct, and that I had learned it very well, but in a woman's voice.

We had excitement. As you started to wrestle, maybe you're starting to win or this person's, like, really into it, so you kind of get the excitement going.

LP: The amazing thing about this is this is, I mean, obviously, these are old games, but the system just sees what you see, the pixels, and it has the controls and it has the score, and it's learned to play all of these games, same program.

Being bullied as a kid created a sense of empathy in me toward the suffering of others, and it comes very unnaturally to me to treat people who are kind in any other way than how I would want to be treated.

You are angry a lot of the time, and I think one of the reasons why this debate is so charged is because it runs through the heart of each of us, right?

(Applause) So, I wanted to leave on a positive note, because that's the paradox that this life has been: in the places where I learned to cry the most, I also learned how to smile after.

Ivan would not maintain eye contact, he had lost the words that he did know, and he didn't respond to his name or to anything we asked him, as if words were noise.

They've been happening for more than 10 years now, so those librarians have kind of turned on a generation of children to books and so it's been a thrill to find out that sometimes unintended consequences are the best consequences.

Perhaps you felt some strange, distant worry about that email you sent this morning or excitement about something you've got planned for this evening.

Maybe if you were really lucky, you felt this: "basorexia, " a sudden urge to kiss someone.