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.
How to Protect Yourself in a Thunderstorm. Lightning is a beautiful and inspiring phenomenon, but it can be deadly. Over the past 30 years, lightning has killed an average of 67 people per year in the United States alone.