We are often told that we can be happy, if we try hard enough. By shifting our mindset, changing our lifestyles, or even writing a gratitude journal – happiness is waiting for all of us! But, what does science say?

Are some of us born gay? People have argued that sexuality is determined before birth, while others believe the environment has a role to play here. So, what does the science say?

Electronic Cigarettes have been hailed by some as a breakthrough in the battle to help people quit smoking, while others say these devices are creating a new generation of nicotine addicts. So, what does the science say?

Pornography has been blamed for destroying our minds and our sex lives. Some even say porn is addictive. But, what does the science say?

Medical marijuana has been called a miracle drug — rumoured to cure an array of ailments, from cramps to cancer. But, what does the science say?

Sugar is no longer the sweet stuff you put in cakes. These days, some claim it's deadly, toxic and as addictive as hard drugs. But, is sugar really that bad for your health?

We've been told that in the battle of the sexes there are important differences between the brains of women and men. But, are our brains really that different?