A massive coronal hole on the Sun is sending solar wind toward Earth, increasing aurora visibility in higher latitudes.

As a result, temperatures are cooler. The changing tilt of the Earth has a bigger effect on places at higher latitudes: in summer, higher latitudes in the northern hemisphere have longer daylight ...

And this is why Everest, if it were at a higher latitude, could very well be beyond the physiological limits of someone trying to climb without oxygen. Only one direct measurement of atmospheric ...