Nan's story

I think it is. I asked you, " How old do scientists think the Earth is?" You said, "5.5 billion years." and I'm afraid you were wrong, Phil. It's 4.5 billion years. OK. Let's recap the vocabulary we've learnt, starting with the idiom my jaw dropped, which is used to say someone looks very shocked and surprised. A hypothesis is a suggestion that's proposed to explain something, which can then be..

새로운 한 해가 시작되고 며칠간 강추위가 계속 되었다. 한 해 중 가장 추운 달, 1월. 좋은 뜻을 너무 무겁게 가지고 가지 말고, 재미있게 가볍게 가지고 다녀야 함을 배워간다. 정법공부를 재밌게 하며 가볍게 웃으며 일상을 살아 가기를...

Do you believe there's life on other planets?Well, theer's a lot of other planets, so yeah, I think there must be. Yeah, I agree. Well, it's a question that interests American astrophysicist Adam Frank, who discussed it with his clleague Gavin Schmidit, director of Nasa's Institute for Space Studies. Here, Adam recalls their conversation for BBC World Service programme CrowdScience. We know that..