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501. NAIL CLIPPING: What did people do about their finger and toe nails before the invention of nail clippers and of scissors? What do our cousins the big apes do?
When were scissors invented? by whom? Send your answer

481. RELATIVITY: TIME COMPRESSION. Doesn't the theory of relativity state that a space ship traveling at near the velocity of light for one year (by the ship's clock) would take perhaps one hundred years as shown on a stationary clock?
But could we not consider the space ship as stationary and, RELATIVE to it, the other clock as traveling at almost the velocity of light?
Does time run slower at the equator where the velocity of the earth's rotation is about 1670 km/h than in, say, Barrow (Alaska) where it is less than 540 km/h? slower on Mercury, which circles the sun at over 170'000 km/h than on Neptune which goes at less than 20'000 km/h? Send your answer

421. How can I find out the calculated velocity of a sphere of given characteristics (size, mass) initially at rest in a fluid of given characteristics (specific mass, viscosity) in a given gravitational field? Send your answer

411. What is the probability that a coin tossed onto a smooth horizontal surface will come to rest neither heads nor tails but standing on edge? Send your answer

301. Some plants fold their leaves at night, others close their flowers. Quicker yet, some plants catch insects in their leaves or nematods in their roots. Lacking a nervous system and muscles, how do such plants manage to react by moving in that manner? Send your answer

401. How long does it take to empty a bottle (or other container of liquids)? What are the significant variables? Send your answer
402. How much of the liquid will remain adhering to the inside of the container? Send your answer

.On the average, how are

a. intelligence,
b. success in school,
c. success in life,
d. health,
e. life span,

correlated to:

1. being an identical twin, as compared with people born singly; Send your answer

2. being an identical twin, as compared with a fraternal twin; Send your answer

3. being identical twins who go to the same class, dress alike, and do just about everything the same, as compared with identical twins who don't; Send your answer

4. being left-handed, as compared with right-handed; Send your answer

5. being the 1st, 2nd, ...., last born; Send your answer

6. the number of siblings; Send your answer

7. parents' income; Send your answer

8. parents' occupations; Send your answer

9. being raised by a single parent, as compared to by both parents; Send your answer

10. growing up bilingual as compared to monolingual; Send your answer

11. how much TV you watch when you are 8 or 9; Send your answer

12. how much homework you do in 3rd grade; Send your answer

13. how much sleep you get when you are 8 or 9; Send your answer

14. how many friends you have when you are 8 or 9. Send your answer

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In all the questions about animals, artificial means and help from another species are excluded (for example a flea on a cheetah will not be credited with the speed of the cheetah).

101. In relation to body length, which animal (excluding those of 101a) has the longest tail? Send your answer

101a. Does the tail of a snake (worm, eel) start right behind its head? If not, where? Send your answer

102. In relation to body length, which animal has the longest tongue? Send your answer

103. In relation to body length, which animal has the longest claws? Send your answer

104. In relation to body size, which animal can swallow the biggest bite? Send your answer

105. Which animal can fly the highest (and how high is that)? Send your answer

106. Which animal can stay airborne the longest (and how long is that)? Send your answer

Which animal can cover the greatest distance (and what is that distance) in:
107. — one minute?      Send your answer
108. — one hour?      Send your answer
109. — one day?      Send your answer
110. — one week?      Send your answer

111. Which animal can survive the longest (how long?) without food or drink? Send your answer

112. Which animal can survive the longest (how long?) without food or drink and without going into a dormant state? Send your answer

113. Which animal can burrow the deepest underground (how deep)? Send your answer

114. In relation to body size, which animal can lift the greatest weight and what is that weight? Send your answer

115. In relation to body size, which animal can jump the highest (how high?)? Send your answer

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116. Which warm-blooded animal has the highest normal body temperature and what is it? Send your answer

117. Which warm-blooded animal has the lowest normal body temperature and what is it? Send your answer

118. Which animal can be active in the highest temperature and what is it? Send your answer

119. Which animal can be active in the lowest temperature and what is it? Send your answer

120. Which mammal has the largest average litter? Send your answer

121. In proportion to body weight which animal eats the greatest weight of food in one average day of its life? Send your answer

122. Which mammal sleeps the most hours (how many?) out of the 24? Send your answer

123. Which animal is the loudest? Send your answer

124. Which animal has the best sense of sight? Send your answer

125. Which animal has the best sense of hearing? Send your answer

126. Which animal has the best sense of smell? Send your answer

127. Which animal has the best sense of direction? Send your answer

128. Do aquatic animals drink? Send your answer

129. Which aquatic animal has the greatest vertical range? Send your answer

130. How do deep diving aquatic animals avoid getting “the bends”? Send your answer

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