A new study suggests naturally occurring genetic changes in cells could eventually limit human lifespan, even if other causes of ageing were eliminated.
Saudi Arabia, Pakistan, and Turkey have signed the Mecca Agreement. The agreement, which targets Israel and Iran as main adversaries, has drawn attention for its recognition of mutual defence. However, its credibility is uncertain due to its non-public nature. It is also seen as a way for Saudi Arabia to build its military capabilities with the assistance of China and Turkey.