A columnist at the New York Times has written that he believes that technologies like Apple’s upcoming watch could be as as dangerous as cigarettes and cause cancer.

You never forget the first time you see an iceberg. The horizon of a ship at sea is a two dimensional space and to see a three dimensional piece of ice appear in the ocean is quite something.

But, in truth, the first iceberg you see is likely to be small.

Most icebergs that make it far enough north from Antarctica to where they are danger to shipping are sometimes many years old and at the end of their lives. They are small fragments of what once left the continent.

Filmmakers know personality disorders make for compelling viewing.

Think of attention-seeking Scarlett O'Hara in "Gone with the Wind" (1939). Or the manipulation and callous disregard for others in "Silence of the Lambs" (1991), "The Talented Mr. Ripley" (1999) and "Chopper" (2000). Then there are the fears of abandonment and emotional instability in "Fatal Attraction" (1987) and "Girl, Interrupted" (1999).

Cinema is less adept, however, at showing the ordinary joys, heartache and sometimes suicidal despair of the friends, workers or relatives we might know with personality disorders.

Who volunteers to have sex in a laboratory?

I was struck by this question when reading about an experimental study of ideal sexual positions for men with back pain.

For the purpose of the research, couples were filmed using motion capture and infra-red technology while they had sex.

The researchers were in a separate booth where they could hear, but not see, the participants. Electrodes were used to record muscle activity in certain parts of the body, to get an idea of force.

When checking your email over a secure connection, or making a purchase from an online retailer, have you ever wondered how your private information or credit card data is kept secure?

Our information is kept away from prying eyes thanks to cryptographic algorithms, which scramble the message so no-one else can read it but its intended recipient. But what are these algorithms, how did they come to be widely used, and how secure really are they?

Narcissistic children feel superior to others, believe they are entitled to privileges and crave admiration from others.

When they don’t get the admiration they want, they may lash out aggressively.

Why do some children become narcissistic, whereas others develop more modest views of themselves? We have undertaken research into this question and we found socialization plays a significant role.