Pourquoi voit-on à travers une vitre ?

Quand on pense à une montagne géante, on imagine souvent Mount Everest, culminant à près de 8 849 mètres. Pourtant, dans le système solaire, cette montagne paraît presque modeste. Car le véritable record absolu se trouve sur Mars, et il écrase littéralement tous les autres relief ...  Show more

On pourrait croire qu’un arbre pousse mieux en pleine forêt, entouré de nature. Pourtant, plusieurs études scientifiques montrent l’inverse : dans de nombreuses régions du monde, les arbres des villes grandissent plus vite que ceux des campagnes ou des forêts voisines. Une vaste ...  Show more

What is a photon and how do we know it exists? Particle Physicist Professor Daniel Whiteson explains the photon.

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Melvyn Bragg and guests discuss an atomic particle that's become inseparable from modernity. JJ Thomson discovered the electron 125 years ago, so revealing that atoms, supposedly the smallest things, were made of even smaller things. He pictured them inside an atomic ball like a ...  Show more

While glass items have been made for at least 5,000 years, scientists are yet to explain, conclusively, what happens when the substance it's made from moves from a molten state to its hard, transparent phase. It is said to be one of the great unsolved problems in physics. While a ...  Show more

Dark matter sounds as mysterious as it is - an invisible form of matter that permeates our universe that physicists have not yet been able to detect! And yet, most physicists are extremely confident that it exists. Learn why!

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