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"I do not fear computers. I fear the lack of them."

Physics

What will spacecraft be like in the future?»
Space shuttles will be replaced quite soon with space planes. America is developing a space ...
Who is building a new space station?»
America is leading a group of countries to build an international space station (ISS). The ...
What bounced around on Mars?»
The Mars Pathfinder probe dropped on to Mars inside a bundle of balloons. The balloons ...
Which voyagers visited all the planets?»
Humans can’t travel to other planets yet. A trip to Mars would need much bigger ...
Is there a telescope in space?»
Astronomers on Earth have their view spoilt by our cloudy, dirty atmosphere, which makes ...

Chemistry

What are acids and bases?»
ACIDS AND BASES Some substances and chemicals are very reactive. This means they ...
What are crystals and what are Solutions?»
CRYSTALS In many solid substances, the atoms or molecules are fixed in place but ...
What is oxygen and hydrogen?»
OXYGEN We cannot see, smell or taste oxygen. Yet it forms one-fifth of air and is ...
How would you help me to understand what molecule is?»
MOLECULES Atoms make up all the objects and substances in our world. But they ...
Why some metals are precious?»
PRECIOUS METALS Certain types of metals are precious or valuable. This may be ...

Biology

Which bear fishes for its supper?»
The brown bear is a top angler. It knows just the time of year that delicious salmon head ...
Which is the biggest bear? »
The powerful polar bear weighs in at 600 kg, which makes it about ten times heavier than a ...
Which is the biggest dog?»
The grey wolf is biggest wild dog and the most powerful. Males can be as long as two metres ...
Do hyenas laugh? »
The spotted, or laughing, hyena has two different calls. One sounds like a laugh, but the ...
How do dogs hunt? »
Many dogs, including African wild dogs, hunt in groups called packs. First they spread out, ...