Next to it rests a dark sliver of 2.8-billion-year-old lava from the Moon.
Anderson, a planetary scientist at the Southwest Research Institute in Boulder, Colorado, picks up his favourite, a 1-gram slice of rock that cost him US0.
Nevertheless, there is substantial evidence that the Earth and the other bodies of the Solar System are 4.5-4.6 billion years old, and that the Milky Way Galaxy and the Universe are older still.
The principal evidence for the antiquity of Earth and its cosmic surroundings is: Spontaneous breakdown or decay of atomic nuclei, termed radioactive decay, is the basis for all radiometric dating methods.
including profiles from other sites such as 'Po F', which made me suspicious.
As a result, rocks that record its earliest history have not been found and probably no longer exist.
With Watson and Stelle’s study in mind, we’ve tested several popular dating sites, looking also for easy online experiences, and come up with five – both free and fee-based, senior-specific and all-ages – that we deem senior-friendly. Click here to visit OKCupid Note Be aware when signing up for auto-payment on any online dating site: Complaints have been filed that certain sites continue to charge monthly fees after a member cancels. See our updated Best Senior Dating Sites (2014) Thinking of trying online dating?
Check out more Senior Planet articles: How to set up your online dating profile in 4 easy steps 11 ways to quit lurking and write your online dating profile Do you have a favorite dating site?
Coaxing out that information is far more difficult.
Zigzagging across his laboratory is a web of laser beams that feed into a mass spectrometer — all part of a geochronometer that Anderson is building.