chemistry
#40
Argon is useful for science but a poor choice for breathing.
#52
Cesium-137 is a radioactive isotope which produces gamma rays hazardous to many species yet apparently ineffective when studying the nature of Astrophage.
#86
Rocky breathes ammonia, and Ryland has good reasons to be taken aback by this.
#87
Various chemical compounds are mentioned in Project Hail Mary
#92
Twenty-one different chemical elements are mentioned in Project Hail Mary
#105
Xenon is a noble gas that can, in fact, form a number of chemical compounds.
#112
How are mentions of elements distributed in Project Hail Mary
#143
Antarctica was once home to a temperate forest which is, weirdly, why Leclerc has to nuke it.
#165
Methane is found in the atmospheres of worlds both near and far.
#170
Astrophage have an extra step or variant in their Krebs cycle.