The Rhenium Age?

“Rhenium?”, you might ask, “what’s that?”. It’s among the more obscure elements in the periodic table, but not for lack of utility; indeed, rhenium is highly desired as a high-performance material in jet engines as well as rocket engines. Why? Because high temperatures are involved, … Continue readingThe Rhenium Age?

Paradise Lost

“Humans are tropical animals”, it’s said. Or are we? True, our ancestors did come from Africa (well…our homo sapiens ancestors, anyway), but seldom is it asked: what was Africa like for them? Consider that while the tropics are oppressively hot and humid now, we are … Continue readingParadise Lost