11. Lightning’s Role in Evolution
Although lightning is usually associated with a destructive power, it might have been absolutely vital for the evolution of life on Earth. Some scientists suggest that lightning bolts in the primordial soup of early Earth could have supplied the energy required to create sophisticated organic molecules, hence commencing the process of life.
When nitrogen in the atmosphere combines with other elements under lightning, amino acids—the building blocks of proteins—are produced. Researchers have proven in laboratory simulations of early Earth circumstances that a range of organic chemicals required for life may be generated from electrical discharges akin to lightning.
Moreover, evolution nowadays is still influenced by lightning. Fires caused by lightning have a major impact on ecosystems, therefore affecting plant distribution and animal behaviour. Some plants have even developed to depend on regular fires for seed distribution or to eliminate competitors.
Additionally produced in the soil by lightning are nitrates, which are organic fertilisers. This process has probably shaped the evolution of plant species by favouring those that can fast seize advantage of these nutrient spurts. Nitrates created by lightning in aquatic habitats can induce algal blooms, therefore influencing the whole food chain.
The continual fear of lightning strikes has also probably affected animal behaviour, therefore affecting the development of various protective actions and instincts for seeking cover. Lightning thus remains an evolutionary agent, gently directing the evolution of life on Earth.