Tigers DO live in the 'jungle', so are harder to find. In the wild, the two do not meet, so there was always a question as to who was the stronger. The lion LOOKED bigger, so was assumed to be stronger, but lions and tigers have different muscle structure, since lions run more in life, and tigers climb more.
Sleep Hygiene The most common cause of insomnia is a change in your daily routine. For example, traveling, change in work hours, disruption of other behaviors (eating, exercise, leisure, etc.), and relationship conflicts can all cause sleep problems. Paying attention to good sleep hygiene is the most important thing you can do to maintain good sleep.
Most people, however, will find they sleep best by keeping the temperature in their bedroom no higher than 70 degrees F and perhaps even a bit lower than that. Interestingly, while a cool room and a lower core temperature may help you sleep better, cold hands and feet will not. Because blood flow is a prime method of distributing heat evenly throughout your body, if your extremities are cold it could be a sign of poor blood flow, which results in sleeplessness.