The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Pumice is the only rock that floats on water.
14
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
Sound travels fifteen times faster through steel than through air.
134
Scientists aren't sure what color dinosaurs were.
312
Your brain is 80% water.
525