The 20 online talks that could change your life

Tom Meltzer: From TED talks to online seminars, video channels crammed with inspirational and thought-provoking lectures are educating us on everything from town planning and depression to body language, animal morality and dangers of sugar in just a few minutes. Here is our pick of the best

Why such outrage over porn filters? The idea seems perfectly reasonable to me

Deborah Orr: The angry arguments against David Cameron's opt-in filter proposals seem to imply that it's normal to want access to porn, and abnormal not to want access to porn

Royal baby: gloomy prognosis for babies born in July 2013

The next generation will face heatwaves, dementia and a reduced quality of life, according to predictions

How can I use laptops and tablets without suffering from physical pains?

Reid Railton wants tips on the ergonomically correct way to work to prevent strain, and 'iPad neck'

Trying to kick your apps addiction? Yes, there’s an app for that…

Pause iPhone app wants to 'help us reconnect with real life' by using the smartphone's Airplane Mode and gamification. By Stuart Dredge

Should I keep my smartphone and tablet out of my bedroom?

Luisa Dillner: Having smartphones on all the time, and using them for wake-up calls and that last email, is convenient. But is it good for sleep?

Bedtime blues: how to get children to sleep

One in five parents think their children are not sleeping well enough. Jon Henley meets Professor Paul Gringras, a sleep disorder specialist, who explains the importance of a good routine and how to achieve it

Peering at bright screens after dark could harm health, doctor claims

Light from TVs, computers, tablets and smartphones may disrupt sleep and raise risk of obesity, heart disease and depression

The food apps that could be bad for your children’s health

Sue Quinn: Kids enjoy food-based games – and tablets and smartphones offer a fun, interactive playing experience. But what happens when they are adverts for unhealthy processed food in disguise?

Using Windows 8 on touchscreen laptops could be a pain in the shoulder

Experts say using touch surfaces in vertical position is very risky ergonomically. By Emma Woollacott

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Our Chemist – Health