What did small dinosaurs feed on? There were carnivores as well as herbivores among the small dinosaurs. The former ate small insects, reptiles and worms while the latter ate plants. The tiny Lesothosaurus lived in herds. Other small dinosaurs included Compsognathus, Hypsilophodon, and Oviraptor.
Why do human beings have two nervous systems? Human beings have two nervous systems. The cerebrospinal nervous system is responsible for all our voluntary actions and our responses to external stimuli. It controls thought, sensation and action. The automatic nervous system is responsible for our...
Why do people get sea-sick? Organs in the human body which help maintain equilibrium have certain stiff hairs which are surrounded by fluid called lymph. When we are on a ship, the deck on which we stand keeps moving. This makes the lymph rock to...
Why did Egyptian priests wear a jackal’s head? After a person died, a priest would say the final prayers over the body. On this occasion he wore a mask resembling the jackal god, Anubis, who was the god of the dead. At the tomb, the...
Was Persia rich? Persia became a wealthy empire under Darius I. The palace he lived in was huge and was located in Persepolis. It had a great hall which could accommodate 10,000 people. During his invasion of Persia, Alexander the Great took 4,500 tonnes of...
Can echoes travel through water? Sound can travel through water. This means that echoes can travel through water too. The speed at which sound travels through water exceeds 1,430 metres a second. Ships have devices for sending and receiving signals under water. Such devices are...
What are scallops? A dish of scallops in restaurants resembles small squares. They are actually the muscles of certain molluscs. The muscles help to open and close the shells of the molluscs. Scallops are always wandering from place to place. They move by sucking water...
What is E.S.P? E.S.P or extra sensory perception is the ability to perceive things which are beyond the use of our ordinary senses. It is also referred to as clairvoyance, telepathy or precognition. Not everyone has this ability and those who do often have the...
When did fish appear on earth? The first fish appeared in the seas around 500 million years ago. They did not have jaws or fins. Dunkleosteus was a fish that was a fearsome predator with razor-sharp bony cutters in its jaws. It had an armoured...
What is a Parthian shot? The Parthians lived in Persia in 1000 BC. After Alexander the Great died they took over Persia. One of the favourite tricks of Parthian archers during battle was to act as if they were retreating and then turn in their...
