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By shutting down half of their penis at a time, male echidnas fit perfectly with the female’s two-branched reproductive tract. This creature’s coat of quills don’t spare its genitalia, which features penile spines—a horrifying frequent trait in the animal kingdom (even humans once had them) which may increase fertilization success or trigger ovulation. Getting Handsy Children will adore this hilarious rhyming story by the much-loved author, Kaye Umansky, one of the funniest children's writers around. Higman, B. W. (2012). How Food Made History. Chichester, UK: John Wiley & Sons. ISBN 978-1-4051-8947-7. Fitter, Julian; Fitter, Daniel; Hosking, David (2000). Wildlife of the Galápagos. Princeton, NJ: Princeton University Press. ISBN 978-0-691-10295-5. Their two-headed penises resemble tiny swords, and battles can last for up to an hour as they take turns attempting to stab the other. The winner pierces the flesh of the other flatworm to deposit their sperm, something scientists refer to as “traumatic insemination.”
Hirsch, Adam (October 7, 2008). "Voting Round for the BOSS Mashable Challenge". Mashable . Retrieved March 19, 2013. Maisels, Charles Keith (1999). Early Civilizations of the Old World. London: Routledge. ISBN 978-0-415-10975-8. Penises have been a longstanding subject of scientific fascination, and they’re far more studied than vaginas. One explanation for this research gap, says Willingham, is “because of who has been asking the questions until quite recently, and who's been deciding how those questions should be answered.”a b c "History". October 6, 2013. Archived from the original on October 6, 2013 . Retrieved November 12, 2018. SS: I didn’t know that drakes’ phalluses fell off at the end of mating season and then regrew the following season in proportion to the pressure they felt from other drakes. Apple – OS X Yosemite – Apps". Archived from the original on September 26, 2014 . Retrieved September 30, 2014.
SS: We are a vegan agroecological, agroforestry farm on 1300 acres practicing rewilding agriculture and trying to demonstrate how to partner with traditional farm animals in a new context where they are not commoditized as part of the food chain. Like many organisms with intriguing phalluses, flatworms that engage in penis fights are hermaphrodites—just one example that showcases how a sex binary system fails to account for the range, fluidity and diversity of many organisms. Some species of flatworm engage in this duel to see who can inseminate the other. Donne-Goussé, Carole; Laudet, Vincent; Hänni, Catherine (July 2002). "A molecular phylogeny of Anseriformes based on mitochondrial DNA analysis". Molecular Phylogenetics and Evolution. 23 (3): 339–356. doi: 10.1016/S1055-7903(02)00019-2. PMID 12099792. Drip, Drip, Drop" is another version played by children mostly in warmer climates. One player who is "it" goes around the circle with a container of water and "drips" a small amount on each person's head. They will then select someone in the circle to "drop" the entire container on top of them. This player will then try to tag the "it" before the "it" sits in the spot of the person who got "dropped" on. If "it" is tagged then they will remain "it" for another round. [8] Mush Pot [ edit ]Christidis, Les; Boles, Walter E., eds. (2008). Systematics and Taxonomy of Australian Birds. Collingwood, VIC: Csiro Publishing. ISBN 978-0-643-06511-6.
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