Within the next few tens of millions of years it will crash into the planet; we are catching it at the tail end of its 4.5 - billion - year life. (discovermagazine.com)
The age of the oldest rocks is known PRECISELY to within a few tens of millions of years, as determined by several different radiometric dating methods. (religion.blogs.cnn.com)
These stars are thought to be less than a few tens of millions of years old, and preliminary analysis suggests that they are hotter and brighter than stars formed in less extreme environments such as the galactic disc. (sciencedaily.com)