Researchers recently found kimberlite ( ' , 金伯利巖) deposits hinting at the existence of diamonds.

Our support structure was more like: ‘You are going to get through Yale; you are going to do well,' he said, hinting at mentors ( ' , 導師 ), staff, and professors who all provided significant support for students who lacked confidence about belonging at such a top institution.

And though Hu Jintao and the rest of the Chinese leadership aren't inclined to lecture visiting Presidents, he might gently hint that Beijing is getting a little nervous about the value of the dollar-which has fallen 15% since March, in large part because of increasing fears that America's debt load is becoming unmanageable.

That's what happens when you're the world's biggest creditor: you get to drop hints like that, which would be enough by themselves to create international economic chaos if they were ever leaked.

But in today's lecture, we'll look at three very interesting studies that hint at surprising abilities of human babies.