PALEO-RESEARCH INSTITUTE, CA – A groundbreaking new study from the Paleo-Research Institute has definitively concluded that early mammals abandoned egg-laying primarily due to what researchers are calling 'a profound and growing disinterest in the sheer effort involved.' The findings suggest that the transition to live birth was less about biological advantage and more about a collective, ancestral sigh of relief.

“We’ve analyzed countless fossil records and behavioral patterns,” stated Dr. Evelyn Thorne, lead paleontologist. “The data points overwhelmingly to a species-wide consensus that creating a calcified shell, then sitting on it for weeks, often in a precarious nest, was simply not sustainable for their burgeoning social calendars and increasing desire for mobility.”

According to the report, early mammalian mothers frequently complained about the 'unrealistic expectations' placed upon them by the reptilian establishment. “One fossilized proto-mammal skull shows clear signs of chronic eye-rolling,” Dr. Thorne added, “suggesting a deep-seated frustration with the entire process.” The study also highlighted the logistical nightmare of finding suitable, predator-free incubation spots, which often conflicted with prime foraging times or networking opportunities with other proto-mammals.

Ultimately, the evolutionary shift was deemed a 'quality of life upgrade,' allowing for more spontaneous travel and fewer broken shells. Sources close to the ancient mammalian community confirm that the move was widely celebrated, particularly by those who found the concept of 'nesting' utterly exhausting.