Group 1 - The core viewpoint of the articles highlights the introduction of planarians, a flatworm with remarkable regenerative abilities, into the Chinese space station for scientific experiments [1] - Planarians have been used in biological research for over 520 million years and can regenerate various body parts, including muscles, skin, intestines, and even the brain, which is significant for understanding aging and regeneration mechanisms [1] - The Chinese space station will utilize a "small universal biological culture module" within the "life ecology experiment cabinet" to study the effects of the space environment on planarian regeneration and physiological behavior [1] Group 2 - Previous experiments in the Chinese space station involved zebrafish and fruit flies, which are important model organisms for life sciences research due to their genetic similarities to humans and established research history [2] - Zebrafish, with over 70% genetic similarity to humans, were sent to the space station in April 2024 to study the impact of microgravity on vertebrate muscle and bone proteins [2] - Fruit flies, used for over a century in research, were sent in November 2024 to investigate their growth, movement characteristics, and biological rhythms under microgravity and low magnetic environments, providing insights for future human exploration of the Moon and Mars [2]