Sometimes, if it's something I understand and can put in layman's terms. A lot of what they do is super scientific and incredibly technical. I've got a Master's degree, but it's in the social sciences. My brother's Ph.D. is in the REAL sciences. He believes, based on his studies, that human immortality is theoretically possible. In fact, he says there's no real biological reason we can't achieve it. The challenge is to find ways to defeat all the things that play into aging and disease and stop them. Once we stop those, which can also be done, but apparently we're not quite there yet, then immortality, or at least extreme longevity, should become the norm.