Because it's the most abundant element in the universe ... to the original ones on the map. They could even tell how long ago the Voyager spacecraft left Earth. Back before laptops and cell ...

Google Earth's Voyager tool could become a new ... "It doesn't have to be profound." A Voyager-sourced social map could be one of the most expansive repositories of the human experience ever ...

Our latest and best ever map of the early universe is five times more detailed ... 68 kilometres per second per megaparsec distance from Earth. ACT data essentially confirms this, but increases ...