A longevity expert has recommended a simple snack which costs less than a meal deal. Hailed as 'cheap' and something that "everyone can afford", the expert said it's also "delicious". Dan Buettner is an expert on the Blue Zones. These are geographic areas with lower rates of chronic diseases and longer life expectancy. The expert revealed the secret to a longer life, saying that eating popcorn could help you live to 100. In a TikTok video, the 64-year-old National Geographic Fellow and best-