Horizon: Don't Worry Be Happy

00:00:08 I'm Michael Mosley.

00:02:49 It's a quiet - really quite unremarkable - little town

00:05:28 on the desk of Associate Professor Becca Levy.

00:07:38 looking into the power of optimism.

00:10:26 to negative information and others tune in

00:12:16 We know it happens, we don't know why.

00:14:26 This suggests a brain that is even more tuned to the dark side

00:16:51 I don't feel remotely comfortable about doing anything like this

00:19:15 and temperature of the skin.

00:21:14 a part of the brain which evolved to deal with fear and threat.

00:23:31 and so I thought I'd get up and sit around a bit.

00:25:37 What we're hoping eventually is that people can almost use this

00:28:21 He now teaches a modern take on an old idea.

00:30:40 and increased activity in the left pre-frontal cortex

00:32:59 We train the mind, we will be more present

00:35:53 He was never really around in our childhood - very little.

00:38:28 began to wonder why identical twins are not always identical.

00:40:48 The twins are still extremely close and spookily similar in many

00:43:27 couple of years because of the amazing advance in technology.

00:46:34 What does maternal love or affection look like in a rat, then?

00:48:52 in a rat's brain could be predicted by their mother's behaviour.

00:51:50 Whether that's meditation, I don't know, but I think...

00:54:23 OK, well, we've got the results here, and as you can see here, the blue...

00:56:49 I discovered that life events can lead to deep, long-lasting