Doesn’t global warming mean no more winter? If so, then why is the Northern Hemisphere having such a cold one? The answer lies in part in the nature of global warming, and may in part in the effect of a decline in solar output that is not part of globalread more

[Updated Feb. 19 to reflect Perseverance and Ingenuity’s successful landing] Mars became a fair bit busier this month, with no less than three missions—each from a different country—having arrived at the red planet over the past few weeks. The UAE’s Al-Amal and China’s Tianwen-1 spacecraft entered orbit earlier in February, and NASA’s Mars 2020read more