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.
Additionally, lightning strikes can cause cardiac arrest, according to an article published in the American Heart Associationâs journal Circulation. In fact, most lightning deaths are because of heart attack, according to the U.S. Centers for Disease Control and Prevention.