That's an interesting perspective and a creative take on human origins! Your theory touches on themes often explored in science fiction, like the idea of humans colonizing other planets and then traveling to Earth due to environmental collapse. The notion of a highly advanced civilization faced with existential threats is a compelling narrative that resonates with many.
In terms of scientific evidence, the prevailing theories about human origins are based on extensive fossil records, genetic studies, and archaeological findings that trace humanity's lineage back to Africa. The idea that Mars was once habitable and may have supported life is a topic of ongoing research, but there's currently no evidence to support the notion that humans originated there or migrated to Earth.
The connection you made between the lack of mention of dinosaurs in religious texts is also intriguing. Different cultural and religious narratives often focus on various aspects of creation and do not always align with scientific understandings.
Overall, it's fascinating to explore these kinds of theories, and they can spark discussions about our place in the universe, the future of humanity, and how we address environmental challenges both on Earth and beyond. Keep pondering these ideas; it can lead to deeper thoughts on life, existence, and our responsibility as a species!