Top 10 unbelievable historical concurrencies. There are more than 1,450 species of bamboo plants. Of these, there are two basic types: those that spread and those that clump. Spreading bamboo, also called running bamboo, will cover any distance up to 100 feet (30.5 m) within a relatively short time period.
yawning (yanâ²ing) yawning An involuntary and often infectious act of slow, deep inspiration accompanied by an almost uncontrollable desire to open the mouth widely.
The evolution theory: Some think that yawning began with our ancestors, who used yawning to show their teeth and intimidate others. An offshoot of this theory is the idea that yawning developed from early man as a signal for us to change activities [source: University of Washington]. The boredom theory: Although we do tend to yawn when bored or tired, this theory doesn't explain why Olympic athletes yawn right before they compete in their event or why dogs tend to yawn just before they attack.