title: What made the rain red in India? Isotopic analysis points to a terrestrial origin for the unusual organic particles that colored the rain like blood.
authors.forename: Barry E
authors.initials: BE
authors.lastname: DiGregorio
mesh_terms: D000336:Aerosols; D002247:Carbon Isotopes / Q000032:analysis; D003116:Color; D004784:Environmental Monitoring / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007194:India; D009587:Nitrogen Isotopes / Q000032:analysis; D010316:Particle Size; D011891:Rain / Q000737:chemistry*
chemical_list: D000336:Aerosols; D002247:Carbon Isotopes; D009587:Nitrogen Isotopes