Asked about the environment, Hawking said he was "very worried about global warming." He said he was afraid that Earth "might end up like Venus, at 250 degrees centigrade and raining sulfuric acid."
The comment is a pointed one for China, the second largest emitter of the greenhouse gases that are blamed for global warming, after the United States. Experts warn that if emissions aren't reduced the world's glaciers could melt at unprecedented speeds, triggering floods, droughts and other environmental disasters, according to the AP.
Russian officials have repeatedly declared that Israeli aviation poses a threat to the Russian military in Syria.