Nicoya, Costa Rica is, according to Dan Buettner, home to the 'most extraordinary centenarians on the planet'. One which, for many years, he contends, went unnoticed because researchers couldn't believe the residents of 'such a poor country' could possibly live past 80, let alone 100.

In this very special episode of Blue Zones: Revisited (recorded live in Costa Rica!) we question exactly how 'poor' the 'Rich Coast' country really is, whether or not it's better to have a plan de vida or a pura vida, and whether pork lard and eggs constitute a 'plant-based diet'.

Telomeres in Costa Rica

Stanford article on longevity in Costa Rica

American insurers and medical tourism

Fact check: does corn on the cob provide enough protein?

20 foods high in vitamin C

The 2010 draft of the WHO calcium article

Dr. Steven Lin's TedX talk about dental health

Gallup analysis of religiosity and poverty

National Geographic fruit infographic

US fruit consumption statistics

The Economist's Big Mac Index