Sale
#41 – Why are there craters on the Moon?
$7.50
Why does ice melt?
Why are bird eggs of different colours and shapes?
Why do trees shed their leaves?
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.
cfengnian –
I liked and learn alot.