Nothing to quack about.
practices. Patricia Brennan, an evolutionary biologist at Mount Holyoke College, studies the strange evolutionary contest between the duck vagina—which is often convoluted and rigged with deceptive pouches—and the duck penis, which is sometimes covered with small hooks like a pale spiral cactus.
Brennan hypothesized that male competition drives the drakes’ penis changes. To test this theory she gathered two different breeds, the lesser scaup and the ruddy duck. She put two groups—five females and eight males from each species—into pens to replicate the social pressures of an unequal sex ratio. To check the consequences of a lack of competition, Brennan created two other groups, with a male and a female pair from each species.
The results of the experiment surprised even Brennan. The ruddy duck drakes that were left alone with females simply grew their penises to full magnitude. But those penned in with other males developed a social hierarchy, and that pecking order seemed to dictate how long their penises grew. The most dominant male grew his penis to a normal length first, and kept it up all mating season.
involved in penis growth. Brennan hopes that learning about the way ducks develop penises might help scientists figure out how humans could grow them. There are wider environmental motivations for this research, as well.
Österreich Neuesten Nachrichten, Österreich Schlagzeilen
Similar News:Sie können auch ähnliche Nachrichten wie diese lesen, die wir aus anderen Nachrichtenquellen gesammelt haben.
Male robs Fifth Third bank branch inside Dave’s Supermarket in ClevelandThe robbery occurred Monday at the bank branch in the Lee-Miles neighborhood of Cleveland.
Weiterlesen »
Democratic Male Leader Invites 'Drag Queen' to Entertain Women LegislatorsThe House Democrats’ 2022 campaign committee has hired a man who dresses as a woman — in “drag” — to entertain Democratic legislators during their pre-election strategy session.
Weiterlesen »
Missing 13-year-old may be with ‘older male’ from FloridaSPREAD THE WORD: Before she left her home, it is reported that she received an Oculus Facebook message from a “Monkey King Budda” in the same time frame as her disappearance. According to the report, the message stated, “I’m waiting.”
Weiterlesen »
Treasury Yields Rise as Inflation Fears PersistU.S. Treasury yields rose on Wednesday morning, despite growing investor concerns around how the Russia-Ukraine war could intensify price pressures.
Weiterlesen »
Temple ‘underachieved’ yet again and struggled to provide Mia Davis with supportWhile Davis broke the school's all-time scoring record, Temple finished 13-15 and endured growing pains in the 2021-22 season.
Weiterlesen »
Makers of basic necessities face 'tradeoff' supplying Russia with cookies, soapMakers of everyday staples from Pampers diapers to Dove soap are walking a fine line by continuing to sell their products in Russia, as pressure grows on multinational companies to take a stand against Russia's recent invasion of Ukraine.
Weiterlesen »