Iron weighs more after it rusts.
68
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Sound travels fifteen times faster through steel than through air.
134
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
The sun is 330,330 times larger than the earth.
75
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Out of all the senses, smell is most closely linked to memory.
146
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21