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.
Causes of yawning a lot. The central cause of excessive yawning or yawning a lot is low CO2 (carbon dioxide) and oxygen levels in brain cells. Most modern people constantly have low brain and body oxygenation. Let us consider why. The physiological norm for breathing at rest (for adults) is only 6 L/min.