How Does a Chicken Hatch from an Egg?
The process mentioned below answers the question how does a chicken hatch from an egg? Inside a fertile chicken egg is a tiny cell called a germ cell? While the hen...
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Why Do Stars Twinkle?
What distorts the light coming from a star is temperature variations in the air. As you probably know already, air temperature varies a great deal. The temperature...
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How Can a Helicopter Go Straight Up?
A Helicopter can go straight up or down and hover in the air without moving. Helicopters can also fly backwards and sideways. They can even take off or land without a...
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Why Can You Sometimes See the Moon During Daytime?
Sometimes we can see the moon during daytime. Some people think that the moon can be seen only at night, but this isn’t true. The moon may rise any time of the...
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What Is Pencil Lead Made of?
The common name “pencil lead” is due to an historic association with the stylus made of lead in ancient Roman times. The ancient Romans used a writing device called a...
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Does Everyone Have a Blind Spot?
Yes, everyone has a blind spot and it is a small area in the back of the eye where there are no rods or cones to receive light. An object is invisible when its image...
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How Do Fingernails Grow?
Fingernails grow from the matrix. As new cells grow in the matrix, the older cells are pushed out, compacted and take on the familiar flattened, hardened form of the...
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How Does a Light Bulb Work?
The light bulb work by giving off light by converting electrical energy into light energy. The light bulb might have been more accurately called the ‘heat bulb’ as most...
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Which Ink Is Used in Erasable Pens?
Erasable ink used in erasable ball-point pens is a gooey substance that looks like tar. Scientists from The Paper Mate Company invented it by combining ink with rubber....
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Why Does a Robin Cock Its Head to Listen?
The robin does not cock its head to listen. The robin cock its head to look for a worm poking out of its burrow. Some people believe that robins are listening for worms...
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