Seahorses first stood up sometime after 25 to 20 million years ago, when bodies of open water between Australia and Indonesia changed, leaving these horse-resembling bony fishes with shallow sea grass habitat, according to a new study.
The study, published in the latest Royal Society Biology Letters, explains that an upright stature, shared by humans but which is extremely rare throughout the entire animal kingdom, allowed seahorses to reside in what was essentially a lawn under water.
"The alleles of my Major Histocompatibility Complex are completely opposite from yours," might not sound like pillow talk, but it is the literal basis for the "chemistry" many couples have.
Two companies, Basisnote and Scientific Match, are developing technology to match couples based on the genetic components of the human immune system -- and their odor.
Studies have linked odor to immune systems and shown that people are most likely to be attracted to the smells of those who have different histocompatibility genes than their own. While those who have similar immune systems tend to not be attracted to each others' odors.
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