According to travel blog Nomadic Matt, Justin Garcia, an evolutionary biologist at Indiana University's Kinsey Institute, said that the extra dopamine in the brain may have helped motivate prehistoric man to venture from home, explore, and seek new territories for mates, food, and shelter.
When transferred into today's lifestyle, that need to venture changes into a need to travel and explore.
Adding to his findings, Garcia also reportedly claimed that the DRD4 gene could begin to explain why some people view travelling as exciting - and others deem it terrifying.
He said: "We don't have very clear answers at this point. But we're seeing that some people are just risky in all areas. Lay people might say those people have "addictive" personalities. They always seem to be doing really impulsive things.
"But we also see that others have these predispositions for risk, and they find [just] one domain to express it in.
"Travel could be one. But what domain an individual is going to pick to express that risk is very much going to be driven by environmental factors and social context."
- Daily Mail
