What Is the Whispering Gallery of St Paul’s Cathedral?
What Is the Whispering Gallery of St Paul’s Cathedral? The whispering gallery is one of the most famous features of Sir Christopher Wren’s great master piece, St....
Read MoreWhat Is the Whispering Gallery of St Paul’s Cathedral? The whispering gallery is one of the most famous features of Sir Christopher Wren’s great master piece, St....
Read MoreWhy Do Bats Make High-pitched Sounds? Bats use high-pitched squeaks called ‘ultrasounds’ to find their way about. They are nocturnal animals. That is they move about by...
Read MoreHow Do Bats Fly in the Dark? A bat can fly in total darkness and yet never bump into anything. The bat has a built-in radar system. As it flies through the dark, it...
Read MoreAre Bats Really Blind? No, bats are not blind. In fact, some can see very well. Bats do, however, come out mostly at night. They are not equipped with special eyesight...
Read MoreWhat Causes an Echo? An echo occurs when sound bounces back from an object. When we speak or shout, sound waves travel through the air. We first hear the sound when the...
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