The Earth's climate is in a constant state of change based on its position relative to the sun. This relationship means that ...

One of the driest regions on earth is shifting green, as an influx of heavy rainfall ... show pockets of plant life popping ...

Paleoclimate and archaeological evidence tells us that, 11,000-5,000 years ago, the Earth's slow orbital 'wobble' transformed today's Sahara desert to a land covered with vegetation and lakes.