Which foods and drinks stain teeth?

If you are a pet owner you know how hard it can be to leave your furry friend at home when you go to work. You may worry about their wellbeing, feel guilty for not spending enough time with them or miss their companionship. According to a BBC article, more than 3 million people i ...  Show more

Many men feel self-conscious about the size of their penis, and it’s often down to constant comparisons with other men, driven by pornography. Interestingly, some men have noticed that their penis appears bigger during warmer weather, and online discussions of this have led to th ...  Show more

Andrea Sella, Professor of Inorganic Chemistry at University College London, celebrates the art and science of the chemical elements. Today he looks at helium. Helium is a finite resource here on Earth and many branches of science need it. Doctors need it to run MRI machines to d ...  Show more

Helium is full of contradictions. It’s the second most abundant element in the universe, but is relatively rare on Earth. It’s non-reactive, totally inert—yet the most valuable helium isotope is sourced from thermonuclear warheads. And even though we treat it as a disposable gas, ...  Show more

Encore episode. Helium is the second-most common element in the cosmos, but it's far rarer on planet Earth. As part of our celebration of the periodic table's 150th birthday, correspondent Geoff Brumfiel shares a brief history of helium's ascent, to become a crucial part of rocke ...  Show more

Helium is the only truly non-renewable resource, and it's essential for things like MRI machines and nuclear reactors, but should we be worried? And, we turn air into food, so why can’t we get carbon to leave the atmosphere – or helium to stay? In this episode, Cosmos Science Jou ...  Show more