Ep 15. Can We Live Forever?

In the final episode of season 1 of Explained, titled "Can We Live Forever?", the topic of immortality is examined. Hosted by Caroline Hroncek, this episode delves into the concept of extending the human lifespan and explores the various methods that have been attempted or proposed to achieve this goal.

The episode begins by acknowledging the fact that humans have always been fascinated with the idea of living forever. However, scientists have long debated whether immortality is possible or even desirable. The episode then introduces the concept of "biological age", the rate at which our bodies age, and suggests that it might be possible to slow this process down or even reverse it.

The first method explored is calorie restriction. Studies have shown that reducing caloric intake in animals has increased their lifespan. The episode explains how this works by activating certain genes and hormones related to aging. Human trials are currently ongoing to test the effects of a calorie-restricted diet on human longevity.

Next, the episode examines a more controversial method: the use of drugs such as rapamycin and metformin to slow down aging. The episode acknowledges that there are still many unknowns about the long-term effects of these drugs, but interviews experts who are conducting research in this area.

The episode also explores the use of stem cells to regenerate damaged tissues and organs. The potential of this method is demonstrated through the story of a woman whose damaged heart was regenerated using stem cells. However, the episode also acknowledges that there are still many challenges to the widespread use of stem cell therapy.

Finally, the episode takes a look at the concept of "uploading" our minds into computers to achieve digital immortality. While this idea may seem like science fiction, experts in the field of artificial intelligence explain the progress being made in creating advanced AI that mimics human thought processes.

Throughout the episode, a variety of experts are interviewed, including scientists, medical professionals, and philosophers. Viewers are given a glimpse into the ongoing debate about the ethics and practicality of achieving immortality, as well as the potential consequences of such an achievement.

Overall, "Can We Live Forever?" offers a thought-provoking exploration of the concept of immortality and the science behind extending the human lifespan. The episode presents a complex topic in a clear and engaging manner, and encourages viewers to consider the potential implications of immortality for society as a whole.