Could humans become immortal?

Xi (left) and Putin were heard discussing methods of prolonging human life in China recently, but scientists say those ways are not realistic. — AP

Vladimir Putin and Xi Jinping have been recorded on a hot mic discussing how organ transplants and other medical advances could let humans live past 150 years, or even become immortal.

But are these comments by the Russian and Chinese presidents, which were picked up during a Beijing summit in early September (2025), backed by scientific evidence?