What is meant by test tube babies?                               32
Why do infants cry soon after birth?                             33
Why do we not remember much about our early
childhood? In particular, the period from 0 to 5 years
seems to be totally forgotten.                                   33
Why does our mouth stink after a night's sleep despite
brushing before going to sleep?                                  34
Why do humans need to brush their teeth while animals do not?    36
Why do people living in coastal areas sweat profusely?           37
How are snake pits formed?                                       39
How do snakes shed their skin every month?                       39
How do mosquitoes locate the source of blood in both
humans and animals?                                              40
Why do some animals have a noncircular pupil? Cats and
some snakes have a vertical shape yet horses and 
goats have a horizontal one. What is the reason, behind
the differences and more importantly, how do the
different shapes affect how animals actually see things?         41
What is meant by embryonic stem cells?                           42
What do seals, or any other marine mammals, drink?               43
Why are consanguineous marriages not advisable?                  43
What is the life cycle of the insect inside the mango fruit?     44
How do pearls form?                                              44
What is a bionic eye?                                            46
What are the differences between hyperplasia and hypertrophy?    47
How do crickets chirp?                                           48
How are calories measured?                                       49
How is gas formed inside the human body?                         50
How does exposure to sun help to produce vitamin-D
in humans?                                                       51
Is it possible to estimate, in megabytes, the amount of
memory available in the human brain?                             52
There are zig-zag lines on human skull. What do they signify?    53
How do astronauts breathe in space?                              54
Why do people feel sleepy while reading?                         55
Why are we unable to see in the dark?                            56
Why is it that only males become bald?                           58
How and why does a chameleon change colour?
Does any other animal exhibit this character?                    59
Why do lips become dry during winter?                            60
How does the camel walk in the desert easily?                    61
How do certain species of birds such as humming birds,
terns, gulls and kestrels remain in the air without a
forward motion?                                                  62
Why do birds fly in formation shaped like the 
alphabet 'V'? Which bird works the hardest in such
a formation and why?                                             64
How do warm blooded animals maintain
their body temperature?                                          65
How does electric eel produce electricity?                       65
Do animals also have blood groups like humans?                   66
How do anti-perspirants work?                                    68
Gene sculpting: of mice, men; ape and essence?                   69
Why can't a man be more like a woman?                            72
How do limbless animals move?                                    75
One scorpion, two venoms?                                        78
`Stemness' of a stem cell?                                       81