The surface of the Earth preserves little or no information about its distant past. Constant tectonic activity has recycled Earth's crust and shifted landmasses. Rainfall, wind, ice and snow have weathered away surface features ...
Jul 08, 2015 in Space Exploration
Using a new age-dating method, an international team of astronomers has determined that ancient star clusters formed in two distinct epochs – the first 12.5 billion years ago and the second 11.5 billion years ago.
Jul 27, 2015 in Astronomy