In a new paper published in Nature today, colleagues and I reveal secrets of Earth’s crust 4.5 billion years ago. In the process, we also provide a new way to approach one of the biggest enduring ...

Now, the world is a cold, barren desert with few signs of liquid water ... planet when it arrived at Mars in 1971. About 4.5 billion years ago, Mars coalesced from the gaseous, dusty disk that ...

Far from being barren wastelands ... Yet more than one billion people, one-sixth of the Earth's population, actually live in desert regions. Deserts cover more than one-fifth of the Earth's ...

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 ... groups of 4–5 (Figure 4), reflecting ...

fragments of various sizes were scattered across a vast area of barren desert. Not only is the meteorite beautiful, it contains information about our own planet’s early history, from the very ...