Why don't birds die when they perch on high-voltage power lines?

It’s not unusual to see lines of birds perched on power lines. But did you ever wonder why birds aren’t electrocuted by the currents that flow through these high-voltage wires? You might think it’s because the wires are insulated, but they’re actually not insulated at all — that’s why downed...

বিস্তারিত...

Why do some trees lose their leaves for winter?

Deciduous trees lose their leaves every winter, rather than maintaining green foliage throughout the year like evergreens do. Often, the trees provide a radiant show of fall color before they lose their leaves, and in some regions, this fall color is a vacation attraction that visitors from...

বিস্তারিত...

Why do bats hang upside down?

This is a little like asking, "Why do people walk with their legs?" People could walk on their arms instead, and some people (acrobats for example) actually do it sometimes. But our legs are a lot stronger than our arms, and the whole human body is set up for walking with the legs. Walking with...

বিস্তারিত...

Why don't microwave ovens heat food containers?

Home materials are fine in the microwave and some aren’t (see below). And then there’s plastic. You’ll find experts who say no plastic containers should be used in the microwave—ever. “The material contains chemicals that may leach into food when it’s heated,” says Olga Naidenko, Ph.D., a scientist...

বিস্তারিত...

Why are Pulitzer prize winners always American?

In the latter years of the 19th century, Joseph Pulitzer stood out as the very embodiment of American journalism. Hungarian-born, an intense indomitable figure, Pulitzer was the most skillful of newspaper publishers, a passionate crusader against dishonest government, a fierce, hawk-like competitor...

বিস্তারিত...

Why do we newlyweds take a honeymoon?

Wedding season is almost upon us, which means that many happy couples are eagerly planning their much-anticipated honeymoons. Whether you are headed to Punta Cana or San Diego, the excitement and joy you feel will likely make any location a dream come true. Yet there are some things to...

বিস্তারিত...

Why is April the First a day for fools?

The origins of April Fools' Day are uncertain, but without doubt they are linked to a time when the year was deemed to begin in late March or early April. In many cultures, the New Year is a time for pranks and merriment. April Fools' Day, sometimes called All Fools' Day, is one of the most...

বিস্তারিত...

Why do we eat three meals a day?

Human body needs food to fuel the processes that keep it alive and warm and provide the energy to move and work. Eating three meals a day seems sensible, but is it healthy? When you want to feel and look your best, it's hard to ignore the conflicting claims that grazing all day or skipping meals...

বিস্তারিত...

Why are Jeans so Popular?

Jeans have widely conquered the hearts and closets of people all over the world. People of all ages irrespective of any gender love to wear this piece of clothing. Since umpteen years jeans have found its place in the wardrobes of rich and poor, celebrities and common man. However, it has not lost...

বিস্তারিত...

Why can't we predict earthquakes?

Scientists who study earthquakes say there is no method at present  which can predict the time and intensity of this natural calamity. While  the probability of an earthquake can be estimated, those claiming to  predict the exact date and time are just fooling the public.According...

বিস্তারিত...