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.
Kids often get afraid when a thunderstorm rolls in. Thunder and lightning are often on the top of the list of fears for younger children. Because of the damage that severe thunderstorms and tornadoes can cause, many adults have a healthy fear of them too. After all, about 212 people are killed in thunderstorms each year, mostly from lightning and flash flooding.