Julianne Moore and Michael Keaton began in 1980s soap operas and 1970s sitcoms, respectively, such ancient history by show business standards that you need carbon dating to measure their careers.

In this quote, Steve Erickson humorously comments on the long and storied careers of Julianne Moore and Michael Keaton, both of whom began their acting journeys in the entertainment industry decades ago. He points out that Moore's start in 1980s soap operas and Keaton's in 1970s sitcoms are now considered part of "ancient history" in the fast-paced world of show business, where trends and stars can rise and fall quickly. Erickson uses the phrase "carbon dating" to emphasize just how far back in time their careers began, highlighting the longevity and the enduring impact of their work in a world where many actors may fade quickly.

By mentioning that their careers span such a long period, Erickson is commenting on how the entertainment industry values freshness and youth. In an industry that often favors newer faces and emerging talent, actors who have been around for decades like Moore and Keaton are seen as veterans who have outlasted many of their peers. The reference to carbon dating implies that their careers are so long-running that they almost require scientific tools to measure their historical significance.

The mention of both actors' humble beginnings also serves to showcase their evolution in the industry. While they may have started in relatively niche or less glamorous roles, both have achieved critical acclaim and widespread fame over time, making their journey a testament to their versatility and ability to adapt in an ever-changing entertainment landscape. It speaks to the rarity of such longevity in a business that often values novelty.

Overall, Erickson’s statement highlights the respect and awe one should have for Moore and Keaton's enduring careers. It underscores the significant amount of time they've spent in the industry, not just surviving but thriving, in an environment where the span of an actor's relevance is often measured in much shorter terms.