So a helium balloon floats! Water has a higher density than air. The particles in a solid are tightly packed, so a lot of particles fit into a given space. This means solids have relatively high ...

"In this case, we crushed iron and helium together under about 5–55 gigapascals of pressure and at temperatures of 1,000 Kelvin to nearly 3,000 Kelvin. Those pressures correspond to roughly ...

Imagine you're at a hot air balloon event. The balloonists are busy preparing for flight. They spread out the enormous balloons on the grass and check all the lines. The talk is all about today's ...

These results suggest that similar reactions between helium and iron may have occurred within Earth’s core shortly after its formation, trapping much of the primordial helium-3 in the material that ...