Sentences with phrase «measured over longer time spans»

Not exact matches

Using an accelerator mass spectrometer at the Lawrence Livermore National Laboratory, the geologists measured how much beryllium - 10 was in their samples — giving them a kind of clock to measure erosion over long time spans.

Someone actually wants to measure things over longer time spans.

But over that long span of time, the ways of measuring that data have changed dramatically, and differences in data collection mean that temperatures collected by ships in the early 20th century might be different from the data collected today.