Queen ants live as long as their colonies. Which dies first the colony or the queen? T his is a tricky question since some species of ants have multiple queens. Let's consider colonies with only one queen first. It's a c…

Why do we hiccup? H iccups happen because of spasmodic contractions of our diaphragm. When our diaphragm contracts, our lungs inhale sharply. This intake of breath in the throat causes that little 'hic' sound. People hic…

How can birds fly in the dark? A lthough most birds go to roost when the sun sets, there are many species that can fly through a darkened sky- because of a variety of techniques. Owls, which hunt at night, have developed eyes th…

How do X-rays allows you to see inside of things? H ow   a flashlight against the palm of your hand and turn it on. Some of the light comes through your hand but you can't see what's inside very well. To get a better vie…

Why is the sea water salty ? As the rains fall and water flows over the land, the water dissolves salt out of the rocks, washes the salt into streams, then rivers, and finally carries the salt to the sea. The salt stays in the …

Did chameleons always change colour or did they develop the ability over time ? Chameleons  Most chameleon species evolved a basic camouflage colouring and pattern which blends with the land and trees they live in. Variations …

Why do we sleep ? Sleep researchers can say for certain that sleep overcomes sleepiness . But, beyond that, researches disagree. Some believe that sleep has no biological purpose, it's just a sort of habit. Some even argu…

Which is the saltiest sea in the world ? The   Dead Sea-devoid of life, except for bacteria, and so salty it quickly kills river fish swept by floodwaters into its brine -is the saltiest sea on Earth. This land -locked lake ge…

Where does a tear come from? How is it formed? Also, what triggers a tear? Is it the emotions, the soul, or spirit? Is it limited to humans? Tears come from two places. First, from tiny glands (called the lachrymal glands), abou…

Why are moths attracted to lights ? O ver the millennia, moths navigated at night by the light of the moon. To fly in a given direction, they would keep the moon in a fixed location, relative to their bodies. For example, to fl…

Why is the sky blue ? Sky Blue Transmitted light (from the sun, light bulbs, fire, etc) is made up of a spectrum of colours. The longest wavelengths of light are on the red end of the spectrum and the shortest wavelengths are o…