Can you imagine a time when people did not use numbers? The first people on earth lived by hunting wild animals and co…

On August 20, 1977, Voyager 2 was launched into space. Two weeks later, Voyager 1 set off.  The two Voyagers were typ…

Until now, human beings have traveled into space only as far as the moon, about 236,000 miles (380,000 kilometers) away…

The kidney filters body fluids within the nephron units and expels wastes via the ureter. Kidney is one of a pair …

Albinism is the lack of brown pigment - melanin, and a person with such property is called albino. The appearance of a…

Strength of normal, healthy human bones is amazing. The bones must be strong, because they make the skeleton which hol…

Endocrine System is a network of ductless glands of internal secretion. The endocrine glands produce and/or store vario…

Hibernating animals breathe much more slowly and their body temperature falls.  They also need much less food.  The…