The Shenzhou-20 crew has carried out its first experiment on planarian regeneration aboard China's space station.
Planarians, flatworms with an evolutionary history spanning over 520 million years, are one of the widely used experimental animal models in biological research. These organisms demonstrate an exceptional capacity for tissue repair: when bisected, planarians can regenerate lost muscles, skin, intestines, and even an entire brain from each segment -- a process that can be repeated indefinitely.
Researchers aim to investigate how the space environment affects the regenerative processes and physiological behavior of planarians. They will also explore the molecular mechanisms behind space-induced effects on planarian regeneration, thereby advancing scientists' understanding of regenerative biology.
Inside the Wentian laboratory module, the Shenzhou-20 crew observed samples in the biotechnology experiment cabinet and used the scientific glovebox to collect solid culture samples. The collected data and samples will assist researchers on Earth in studying the microbial mechanisms affecting cell tissue culture modules.
This initiative follows the successful inclusion of zebra fish and fruit flies in science experiments conducted aboard China's space station.
The Shenzhou-20 crew will carry out 59 additional space science experiments and technology tests in fields such as space life science, microgravity physics, and new space technologies, with potential breakthroughs in cultivation of vascularized brain organoid chips, soft matter non-equilibrium dynamics, and high-temperature superconducting material preparation.
First experiment on planarian regeneration conducted at China's space station
First experiment on planarian regeneration conducted at China's space station
First experiment on planarian regeneration conducted at China's space station
Japan's ongoing push to revise its pacifist constitution and expand military buildup escalate regional tension, warned Japanese lawyer Kyoko Oe, who urged adherence to pacifism and vigilance against the government's dangerous moves.
Since Japanese Prime Minister Sanae Takaichi took office last October, the Japanese government has renewed its push to revise the country's pacifist constitution and accelerated a series of military expansion measures, including increasing defense spending, deploying long-range missiles, and easing restrictions on arms exports.
Speaking on the dangerous policy shifts, Oe criticized the Takaichi administration for bypassing public will.
"We believe that when Japanese citizens are not demanding constitutional reform, pushing it forward through a parliamentary majority clearly violates the principle of popular sovereignty and the obligation to respect the constitution. Moreover, the content of the revision itself is extremely dangerous. [The government] is attempting to change pacifist principles of the Japanese constitution -- the most fundamental part -- and abandon basic concepts, including the renunciation of war and not maintaining military forces," said Oe.
The Japanese government has aggressively accelerated war readiness even under the current constitution, said Oe, adding that amending it will grant the Self-Defense Forces even greater freedom of action at the constitutional level.
"If the constitution is amended, the Self-Defense Forces will gain greater freedom of action at the constitutional level than they have now, and legal interpretations will develop in that direction. Even while the current constitution remains effective, the Japanese government has already forcibly advanced war preparations. For example, manufacturing long-range missiles, which were previously considered unacceptable to possess, and deploying them domestically; conducting joint war games and military exercises with the United States; and massively manufacturing and exporting weapons overseas," said Oe.
The lawyer also criticized Takaichi's provocative remarks on China, saying they have sharply strained bilateral ties and undermined peace and stability in the region.
"We believe that due to Takaichi's remarks made last November, China-Japan relations have become very tense and are deteriorating. Legal experts believe that Takaichi's remarks contain multiple obvious errors. Takaichi should frankly retract the relevant remarks and apologize. Only by building mutual trust with neighboring countries can we maintain our peace, and the peace of East Asia and even the peace of Asia. We believe that what the Takaichi administration is doing runs completely counter to what the Japanese people truly wish to achieve," Oe said.
Japan's constitution revision, military buildup fuel regional tensions: lawyer
