The findings reveal that our DNA contains a sort of global positioning system, which researchers can use to pinpoint where in the world both we and our relatives came from. (sciencemag.org)
Now it includes global positioning systems, cell phones, and huge fishing vessels. (news.nationalgeographic.com)
This leads to the fundamental requirement for a truly global positioning system that at least four satellites be visible at any time from any location on the earth. (scientificamerican.com)