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. Paul’s Cathedral in London. It is the place...
Read MoreThe whispering gallery is one of the most famous features of Sir Christopher Wren’s great master piece, St. Paul’s Cathedral in London. It is the place...
Read MoreBats use high-pitched squeaks called ‘ultrasounds’ to find their way about. They are nocturnal animals. That is they move about by night. So they have developed their...
Read MoreA 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 utters a twittering sound that...
Read MoreNo, 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 possessed by other...
Read MoreAn 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 waves reach our...
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