No, it is not scientifically proven that people can turn back time. The concept of time travel, which involves traveling to the past, is a subject of scientific inquiry and speculation, but no experimental evidence or theoretical framework currently supports the idea that individuals can reverse or alter the flow of time.
Time travel is a topic often explored in science fiction, but within the realm of scientific understanding, time is generally considered a unidirectional dimension that moves forward. Various theories in physics, such as general relativity and quantum mechanics, provide insights into the nature of time, but they do not offer a means for individuals to reverse its flow.
It's important to note that scientific understanding evolves over time as new discoveries are made and new theories are developed. Therefore, it's always possible that future advancements could shed light on the possibility of time travel, but as of now, it remains speculative and outside the realm of scientific confirmation.