Humans live meaningful lives with the knowledge they will eventually die, but an increasing amount of money and resources are being put into researching whether we can significantly prolong the aging process. There’s a growing field of scientific research dedicated to staving off both the physical and mental changes that tend to accompany older age. According to The New Statesman, this anti-aging industry, also referred to as the “immortality industry” will be worth 610 billion dollars by 2025.

But if we do extend life beyond the bounds of present day medicine, what would that mean for humanity, and the planet?

For more on this, we spoke with Thomas Fink, founder and director of the London Institute for Mathematical Sciences, about his understanding of anti-aging and immortality, and the physics behind it.