A new study strongly suggests that at least some memories are stored in genetic code, and that genetic code can act like memory soup. Suck it out of one animal and stick the code in a second animal, and that second animal can remember things that only the first animal knew.

Petrichor (pronounced /ˈpɛtrɨkər/; from Greek petros "stone" + ichor "the fluid that is supposed to flow in the veins of the gods in Greek mythology") is the name of the scent of rain on dry earth.

The term was coined in 1964 by two Australian researchers, Bear and Thomas, for an article in the journal Nature.[1] In the article, the authors describe how the smell derives from an oil exuded by certain plants during dry periods, whereupon it is adsorbed by clay-based soils and rocks. During rain, the oil is released into the air along with another compound, geosmin, producing the distinctive scent. In a follow-up paper, Bear and Thomas (1965) showed that the oil retards seed germination and early plant growth.[2]