The Powerball jackpot hit $1.2 billion. Here's why people believe they'll win — even when the odds are 1 in 292 million.

When it comes to gambling, humans tend to be more optimistic than practical.  We're more inclined to take a risk if there are high earnings involved, Hans Breiter, a professor of psychiatry and behavioral science at Northwestern, said in a statement to Insider. 

The human mind "tends to place more importance on events that probably never will happen, such as winning a lottery," Breiter said. "In parallel, we tend to place less importance on events that absolutely will happen, such as needing medical insurance for health problems associated with aging."

"There's something intrinsically appealing about not being sure [about the odds]," Mike Robinson, an assistant professor of neuroscience and behavior at Wesleyan, told Insider. 

Let's say you didn't win the lottery, but you got half the numbers right. Does that mean you're any closer to winning the next time? 

Not at all. According to economists, past results have no influence on future outcomes. Those who fall prey to the "gambler's fallacy" that they're due for a win sometime soon could wind up losing a lot of money. 

Many people who enter the lottery already recognize that their odds are slim. In fact, that may be the reason why they enter in the first place.

Mark Reinecke, the chief of psychology at Northwestern, told Insider in a statement that people tend to be more frustrated when their expectations are disrupted, like when there's an uncharacteristically long line at the 7-11. 

Robinson agrees, saying that "the average person is OK with throwing away a couple dollars for the chance at something that matters. When put into the person's relative day, it feels trivial."

When we gamble, many of us tend to assume we have control over the outcome — a phenomenon that's particularly acute among pathological gamblers. With the right strategy, people tell themselves, they can game the system and win big.

But psychologists say that this feeling is an illusion. While there may be small things we can do to increase our odds, the lottery is ultimately random.

When the odds are as slim as 1 in 292 million, it's hard to picture what those chances would even look like. That's because our brains haven't evolved enough to distinguish between 1 in 292 million and a much higher probability like 1 in 100,000.

"As soon as we get into the millions, no one knows how to mentally visualize that," Robinson said.

We're also heavily influenced by news stories of other people striking it rich — so much so that we tend to remember the few winners of the lottery ahead of the millions of losers.

It's a function of what's called the "availability bias," which causes us to overestimate our odds based on previous examples. To help put things into perspective, you're more likely to get killed by fireworks than you are to win the Powerball's $1.9 billion prize. Then again, you may be able to hack the system.

This story, which was originally published in March 2019, has since been updated and republished amid the new record Powerball jackpot.