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"Faith is, at one and the same time, absolutely necessary and altogether impossible."

Physics

What storm has an eye? »
A hurricane is a huge, whirling circle of wind and rain. But in the centre of all this wind ...
How hard is the Wind Blowing? »
Wind has many different names, depending on how hard it is blowing. In this question, you ...
How do you explain wind?»
Wind When the air seems calm, and you can’t feel a wind, it doesn’t mean that the ...
What makes the wind blow?»
The wind moves over the land. It sways the tall grass in meadows and rustles leaves on ...
What is air made of? »
Air doesn’t seem to be made of anything. It has no colour, taste, or smell, and you can see ...

Chemistry

What is air made of? »
Air doesn’t seem to be made of anything. It has no colour, taste, or smell, and you can see ...
What is net-zero emission?»
The U.S. president-elect Joe Biden has declared that the U.S. will return to the Paris ...
If water contains oxygen and there is fuel and heat, can a fire burn in water?»
You need three things for a fire, right? Fuel, oxygen, heat. So if hydrogen is ...
What do chemists do?»
Chemists . One of the physical sciences is chemistry. Chemists study chemicals and other ...
What exactly is nuclear energy?»
All things - even you - are made up of billions and billions of “bits” that are ...

Biology

How we can classify land on the earth?»
Land on the Earth The earth is a huge ball, but it is not smooth all over like a ...
What are Deserts? »
The glowing sun glares down on a vast sea of sand. As far as the eye can see, sand ...
What is Oil? »
Maybe you have used oil on your bicycle chain to keep it from squeaking. Did you know that ...
What are Fossils? »
Imagine a giant dinosaur moving along a lakeshore 80 million years ago. It is searching for ...
Why do identical twins have different fingerprints?»
Monozygotic twins or identical twins share the same genetic make-up (or DNA) as they ...