World

Which country issued the world’s first adhesive postage stamp? And what was it called?

Human Biology

How did Swine Influenza Virus (SIV) originate? And how did it get the name H1N1?

Human Biology

Why does persistent yelling make one hoarse?

How things work

How do bakers make a small lump of dough swell up and turn it into spongy bread?

World

Why British national flag is called the Union Jack?

World

What is the story of the New York getting its name?

World

Why are two sides of a coin called head and tail? Where are its roots?

How things work

Why does a boomerang return to its thrower? What's the science behind it?

World

Which are the ten smallest countries in the world measured in terms of area?

World

Which country has the oldest army still in active service?

Science and Technology

Why ships and airplanes measure speed in nautical miles (knots) rather than miles and kilometers?