From similarity and differences of morphological, biochemical, cellular characteristics, biologist have constructed 'phylogenetic (evolutionary) trees' (who is most closely related to who, analogous to a family tree)
In the United States, lightning routinely kills more people each year than tornadoes or hurricanes. Tornadoes, hail, and wind gusts get the most attention, but only lightning can strike outside the storm itself. Lightning is the first thunderstorm hazard to arrive and the last to leave.
To be safe from dangerous lightning follow this simple rule: When thunder roars, go indoors.Lightning kills an average of 55-60 people a year in the U.S. But 90 percent of those who are struck survive, often with permanent neurological disabilities.