The Australian research focused on the thermal effects or specific absorption rate (SAR) of radio frequency radiation - a measure of its actual effects on brain tissue, whereas the earlier study simply looked at electromagnetic radiation levels.

BBC: Hands-free mobiles given safety boost

To measure the frequency of repairs for a particular vehicle, it compared the percentage of reported check engine failures for that model to its share of all 136 million 2002-2012 model-year vehicles on the road.

FORBES: How To Predict What Will Go Wrong With Your Car Down The Road

Ranger IV was also equipped with a seismometer and radio transmitter, designed to be released in a small capsule from the rocket before impact and land on the Moon in sufficiently good condition to measure the frequency of natural earthquakes in the body of the Moon.

BBC: 1962: First US rocket lands on Moon