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Last updated at 13:09 BST, Thursday, 19 June 2014

Deleting memories

Memory sticks

What if you could erase your memories with the click of a button?

We all have bad memories that we would prefer to forget. But can science actually help us delete specific unwanted memories? New research suggests it could be possible.

Rob and Finn discuss the research and explain some words relating to the brain.

This week's question:

How many neurons do scientists think we have? Is it:

a) 8-10 million
b) 8-10 billion
c) 80-100 billion

Listen to the programme to find out the answer.

Listen

Deleting memories

End of Section

Vocabulary

delete

remove, take away

neurons

cells in the brain that transmit information

pulses

short period of energy or electricity

controversial

causing disagreement

a last resort

a method used when all other methods fail

depression

a mental illness where someone is very unhappy and anxious

reactivate

bring back into action

PTSD (post-traumatic stress disorder)

a mental illness where somebody feels very anxious after a frightening or shocking experience, such as war

traumatic

causing severe emotional anxiety

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