Year to date (YTD) refers to the period beginning on the first day of the current calendar or fiscal year and extending up to the current date.

Using paleomagnetism to date rocks and fossils The Earth is like a gigantic magnet. It has a magnetic north and south pole and its magnetic field is everywhere (Figure 6a).

What is carbon-14 dating? The invention of radiocarbon dating elegantly merged chemistry and physics to develop a scientific method that can accurately determine the age of organic materials as old as ...