Eggs laid by dinosaurs have provided paleontologists with a new way to tell prehistoric time. By looking to radioactive ...

Here you can find AQA past papers for GCSE physics. Use the links below to download question papers and mark schemes. If you’re unsure whether you need Foundation or Higher papers, consult your ...

It should also be possible to state how much of a sample remains or what the activity or count should become after a given length of time. This could be stated as a fraction, decimal or ratio. For ...

The clicking of a Geiger counter is well enough known as a signifier of radioactive materials, due to it providing the ...

President Trump has argued the U.S. should test nuclear weapons because other countries are doing it. But scientific data suggest they’re not.

As missions prepare to visit ocean worlds like Enceladus and Europa, new findings show scientists must first learn to distinguish between radiation-made organics and those born in a subsurface sea.