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.
A new U.S. study on driving practices is enough to make you think twice, or at least chug a cup of coffee, before getting behind the wheel. Weight gain, depression, and energy drain are very common effects of sleep deprivation, but scientists are now linking sleep loss with diminished pain tolerance.