Here's the latest science on slowing aging and even rejuvenation where you will become like you were in your 20s. David Sinclair heads Sinclair Lab at Harvard Medical School. That's a legit medical school!

What do we think about getting old? Are we concerned that we won't be able to take care of ourselves and we'll be in a lot of pain? Is that why people don't like to think of themselves as an old person?