50 km up in the atmosphere of planet Venus, scientists found phosphine
[1].
Sorry, what?
Phosphine.
You know, PH
3. That commonly known… no?
It might not sound like much, but
this innocuous molecule defies explanation.
Why should it?
It may not be well known, but this is not the first time we’ve heard of phosphine. The molecule itself is not mysterious. A simple combination of hydrogen and phosphorus, it’s a pungent, colourless gas, that’s both toxic and flammable. It’s highly reactive (that’ll be important later on) and belongs to the same family as ammonia. We can make it in lots of different ways – by exposing white phosphorus or calcium phosphide to water, by the disproportionation of phosphorous acid, or by reacting phosphonium iodide with bases. But it also occurs naturally on Earth.