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New NASA Administrator Jared Isaacman announced a major overhaul of the agency's Artemis moon program Friday, acknowledging that the agency's plan to land astronauts on the moon in 2028 was not realistic without another preparatory mission first to lay the groundwork.
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一名男嬰成為英國首位透過已故捐贈者移植子宮誕生的孩子。