When world leaders, diplomats, campaigners and scientists descend on Sharm el-Sheikh in Egypt for talks on tackling climate change, don’t expect them to part the Red Sea or other miracles that would make huge steps in curbing global warming. Each year there are high hopes for the two-week United Nations climate gathering and, almost inevitably, […]

Better catch the moon’s disappearing act Tuesday — there won’t be another like it for three years. The total lunar eclipse will be visible throughout North America in the predawn hours — the farther west, the better — and across Asia, Australia and the rest of the Pacific after sunset. As an extra treat, Uranus […]