Why and how do falling cats land on their four legs, always?     70
Domestic cats bury their excreta, usually in next door’s
garden and often in well-cultivated soil containing
seeds and bulbs. Most other animals seem to be quite
content to leave their droppings where they land,
undisturbed. What evolutionary advantage has this extra
effort conferred on cats?                                        70
How come zoo animals like lions seem to lie around all day
and yet stay fit? Also pet cats seem to lie around all day
and yet stay fit?                                                71
What factors determine herbivorous and carnivorous
nature of animals?                                               72
Why do the eyes of some animals glow in the dark?                73
How do animals see in the dark?                                  74
Is it true that a red flag agitates a bull?                      75
Do sheep swim? If so, how do they learn?                         75
How do birds navigate home after long journeys?                  76
Why do birds never fall off their perches when sleeping?
Do they, in fact, sleep?                                         77
How do parrots talk?                                             78
Eagles do not flap their wings often, yet fly for long. How?     79
Why do we blink our eyes?                                        79
Why do runners run in anti-clockwise direction?                  80
Why do we run before jumping?                                    80
Why do our arms move to and fro when we walk?                    81
Why does our hair change its colour as we age?                   83
Why does hair fall?                                              84
Why don’t we have hair on our palms?                             85
What is the difference between hair and fur?                     86
Why are some insects attracted towards light?                    87
How do insects enter and live inside mangoes?                    87
How do honey bees find their way back to their hives?            88
How do ants find their way to hidden sweets?                     89
Ants do not get hurt when they fall. Why?                        90
How does ants manage to float on water?                          90
How do ants go in a line?                                        91
With its small body mass, how does a monarch butterfly obtain
enough energy to migrate 1800 miles?                             92
Why does the light of firefly twinkle while that of a
glow-worm remains constant?                                      93
How does a firefly emit light?                                   93
Why do houseflies circle incessantly below hanging light
fittings regardless of whether the fitting is located centrally
or asymmetrically, and whether the light is on or off?           95
Why does the population of houseflies suddenly increase 
in summer?                                                       96
How do leeches manage to prevent blood from clotting?            96
How do leeches suck our blood without causing any pain?          97
Some sea creatures such as horseshoe crab have blue,
copper-based blood. Why is this, and what advantage
does this kind of blood give them over creatures with the
more common red, iron-based blood, like ourselves?
Do any creatures have blood that is based on metals
other than iron or copper?.                                      99
How do the large marine mammals manage to sleep
without drowning?                                               101
When killed, some mosquitoes bleed and some do not. Why?        102
Why do we get a bulge on the skin after a mosquito bite?        103
We know that only female mosquitoes bite. But why do they?      104
How do penguins survive and breed regularly in Antarctica
despite the chill?                                              104
Why is the sting of a scorpion more painful than that of
a snake sting? What are the chemicals in their poisons?         105
Can snakes hear? How do they respond to charmers’ mahudi?       106
Why do snakes move in a zigzag manner?                          106
How do spiders manage without getting caught
in their own web?                                               107
How do turtles reproduce?                                       108
Why don’t identical twins have identical fingerprints?          109