$9.50 $7.50
Why do our feet become numb after sitting for a long while?
Why do prawns turn red when they are cooked?
Why will cockroaches not become extinct?
Why…
Why this? Why that? There are many questions one can easily ask but hard to get the right answers. Come to think of it, there are many scientific mysteries hidden in our everyday life.
$9.50 $7.50
$9.50 $7.50
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