If the conductivity of copper were ten times less, wires would have to be ten times the cross-sectional area to provide the same conductivity. Read More ›
It is very doubtful that any beings in the universe could develop a civilization remotely comparable with our own without the use of metals. Read More ›
James Lovelock has pointed out that atmospheric levels of oxygen much above about 25 percent, let alone 30 percent, would cause raging conflagrations today. Read More ›
