As the Northern Hemisphere welcomes spring today, the Southern Hemisphere is marked with the first day of autumn.

Multi-generational vacations are making a comeback. These timeless destinations offer plenty of cultural, social, and historical insights.

On the equator, the sun is directly overhead ... By that calendar, spring starts on March 1, summer on June 1, fall on Sept. 1 and winter on Dec. 1. Spring is here — officially, at least.

Scientists said warming conditions in the Arctic — the region is warming four times faster than the rest of the world ... summer, Stroeve said. She cautioned that a record low area in the winter ...

Their awareness of world events will heighten ... They happen between the summer and winter solstices, and mark the point the sun crosses the equator's path and becomes positioned exactly above ...