Researchers think they've pinpointed the reason it's unsafe to talk on your cell phone while at the wheel - even with a hands free device.

It apparently has more to do with your mind than it does the phone.

ABC News has more on the findings.

On the other hand, if you have a tendency to glance at emails at night on your phone, or read an eBook in bed - have no fear.

ABC News has the details on a study which concludes it does not mess up your sleep pattern.