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When a balloon pops, sometimes it leaves lots of small fragments of rubber, and sometimes it leaves just a couple of larger pieces. What's going on?
Hard, soft, smelly or blue - there's a cheese for every occasion. But is it time to rethink our relationship with this delicious dairy product?
Easter Sunday can fall in March or April, but the date is definitely not random.
Clothing is made of threads, which are made of smaller-still fibres. And that's where the dirt hides.
Until recently, scientists couldn't work out how a washing machine actually lifted the dirt out of clothes.
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