by How It Works Team · 02/06/2012
[fototag id=”cowpox”]
Tags: cow poxEdward Jennerinnoculationvaccination
17/05/2014
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Did American football derive from rugby?
Why does cling film cling?
What were the Salem witch trials?
Does space have a sound?
How did the sun form?
Do astronauts still have to be quarantined when they return to Earth?
Why do people put chains on tyres in snowy weather?
Why has the James Webb Space Telescope been delayed?
What is sand made of?
What is ‘brain freeze’ and why does it hurt so much?
Why is hydrogen so common in the universe?
When we laugh, what happens inside our body?
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