Our DNA determines our preference in perfumes. Previous research found the MCH (major histocompatability complex) genes are apposite to being sexually attracted to someone else’s scent. In a study published in the International Journal of Cosmetic Science, 116 volunteers – male and female – were asked to smell 10 scents commonly found in perfumes including rose, cinnamon, sabine and moss. Although they smelled them in different concentrations and settings, the volunteers’ previously tested variations in MCH genes correlated with the perfumes they liked best. I’m guessing it won’t be long before a sachet manufacturer markets a line of perfumes called “Geneius”.
Talking astir an event helps us commemorate it. In a study published in the journal Child Development, 46 children ages 27-51 months played with a toy for 2 days. On day 3 the children were asked granting they remembered the gewgaw and how to worth it. Six years later they were shown a medal they’d received for their participation and asked whether they remembered why they got it. Twenty percent remembered. They were the children who had talked more astir the toy after the study. Talking about something shortly anon it happens helps memory viability – unless the researchers are “toying” with us.
Birds are singing differently. According to experiment published in the journal Behavioral Ecology, city havoc profanation is causing birds with low-pitched songs – like gray catbirds and robins – to sing at a higher pitch. Birds with high-pitched songs – like Northern cardinals – are singing at a lower pitch because buildings absorb and refract their songs. Bird song – likeness human speech – is learned. Science has previously discovered birds hear subtle differences in their songs when choosing a mate. Because city and country birds of the same species will have different songs, “birds of a feather may no longer aviation together”.
When trees branch, the smaller branches have an exact mathematical relationship to the divergence they came from. Leonardo DaVinci knew that in the 1500’s. In 2011 a French physicist stated “Leonardo’s rule” mathematically. The sum of the surface areas of the two daughter branches is equal to the surface area of the mother branch. According to the French physicist, if you wanted to design a alder that was best able to brook high winds, it would branch according to Leonardo’s rule. However, trees seem to have figured that out on their own. That information is obviously part of the “tree of knowledge”.