All science investigations or experiments produce data. Recording data accurately is essential to make sure that all results are reliable and trustworthy. Scientists use a range of methods to record ...

How should we study biodiversity change? In an ideal world, we would study many different aspects of biodiversity and how they change over time. This would allow us to distinguish between natural ...

Cepheid variable stars exhibit regular pulsations whose period directly correlates with their intrinsic brightness (absolute luminosity). The Leavitt law establishes this relationship between ...