New: bipedalAll contenthive-129948hive-196917krsteemhive-183959hive-180932zzanhive-185836uncommonlabhive-166405hive-150122photographylifebitcoinhive-188619hive-144064hive-183397krsuccesshive-124908hive-145157hive-109690hive-139150hive-101145photohive-150943TrendingNewHotLikerszafrada (78)in newborn • 3 years agoBipedal vs Quadrupedal Locomotion in Humans?Sometimes I get curious about something our baby is doing, and 20 minutes later, I'm reading an academic paper entitled "What Does Prone Skateboarding in the Newborn Tell Us About the Ontogeny of…johan-nygren (63)in bipedal • 6 years agoChororapithecus abyssinicus, a fossil record of the Gorilla lineage, adapted to high altitudes in the Ethiopian highlandsjohan-nygren (63)in bipedal • 6 years agoPublic Service Announcement: My thesis from the past year, inspired by Steemit, now patented and secured on Ethereum under danakil.ethMy thesis, work from a year or so, is now patented ("to lay open") under danakil.eth, secured by the 50 million dollar "world computer" Ethereum. Here it can be accessed over an IPFS gateway,johan-nygren (63)in bipedal • 6 years agoThe Kobus antelope speciated on the open grasslands on the coast-line of DanakilThe Danakil block separated from the Ethiopian continent around 6 million years ago[1], and became a place where evolution could flourish in a new direction. The coast-lines that developed along…johan-nygren (63)in bipedal • 6 years agoUvula size selected for in humans to prevent choking, compensate for descent of the larynxLike many other mammals, including horses, chimpanzees and gorillas cannot choke on food, since their ability to swallow relies on the epiglottis being closed. In humans, the descent of the larynx…johan-nygren (63)in bipedal • 7 years agoWere Neanderthals from the Paranthropus lineage? P. neanderthalensis, and conical rib cagesThis is pretty cool, Neanderthals are from Paranthropus. Look here: rib cage of Paranthropus, including P. neanderthalensis, conical rib cage of Australopithecus and Homo, cylindrical and the…johan-nygren (63)in bipedal • 7 years agoWere Neanderthals Paranthropus? P. neanderthalensis, and absence of a descended larynxBased on these images and reading a bit on the internet, Neanderthals seem to not have a descended larynx. The human larynx descended as early as 4 million years ago, as Australopithecus…johan-nygren (63)in bipedal • 7 years agoAu. afarensis migrating to the southeastern Ethiopian highlands as a result of earth quakes, around 3 million years agoThe Pthirus gorillae host switch around 3.3 Ma[1] points to that Au. afarensis would have been in contact with ancestors of gorilla. The Danakil-CHLCA (chimpanzee-human-last-common-ancestor)…johan-nygren (63)in bipedal • 7 years agoHuman evolution: eusocial (caste-based) adaptations as a result of a two-species society, Paranthropus as a companion speciesThere is some evidence that points to a hybridization event between Au. afarensis and gorilla ancestors around 3 million years ago. Based on that, the idea is that Paranthropus, as a form of hybrid…johan-nygren (63)in bipedal • 7 years agoArgument against Kenyanthropus platyops as the ancestor of the Homo lineageKenyanthropus platyops, that I would say is a descendant of Au. anamnesis, is often positioned as the ancestor of the Homo lineage. The idea that I blogged about the other day, that the host switch…johan-nygren (63)in bipedal • 7 years agoKenyanthropus platyops as a descendant of Au. anamnesis population in Turkana, and the Laeotli footprints as A. anamnesisKenyanthropus platyops is a 3.5 to 3.2-million-year-old (Pliocene) hominin fossil discovered in Lake Turkana, Kenya in 1999 by Justus Erus, who was part of Meave Leakey's team (brown dot in the map…johan-nygren (63)in bipedal • 7 years agoWere Paranthropus our first “pets”? And dogs as “external noses”The loss of olfactory receptors in Au. afarensis around 3.86 Ma meant that a sort of “external noses” in the form of dogs, as pets, has been valuable. Paranthropus, as a hybrid of gorillae and Au.…johan-nygren (63)in bipedal • 7 years agoInsights into the human genome from the gorilla genome project in 2012, and the idea of a hybridization event 3.3 MaThe human genome was sequenced in 2001, followed by the chimpanzee in 2005 and the gorilla in 2012.[1] The standard view of the great-ape family tree is that humans and chimps are more similar to…johan-nygren (63)in bipedal • 7 years agoParanthropus lineage as result of Australopithecus afarensis — Gorillae interbreeding, and the origin of Pthirus pubis 3.3 million years agoThe host switch of Pthirus gorillae to Australopithecus afarensis 3.3 million years ago (Reed et al, 2007) could be explained by interbreeding of A. afarensis with ancestors of gorilla, around the…johan-nygren (63)in bipedal • 7 years agoHairlessness and pubic hair in Australopithecus, 3–4MaChororapithecus abyssinicus (10–10.5 Ma) is found at the Chorora Formation at the southern margin of the Afar rift. The teeth of Chororapithecus appear specialized for eating stems and leaves…johan-nygren (63)in bipedal • 7 years agodepricatedA model for human lice in two evolutionary steps, more parsimonious than 'pair of lost lice' hypothesis (reed et al, 2007) The Pthirus and Pediculus lineage diverged via co-speciation with…johan-nygren (63)in bipedal • 7 years agoLoss of olfaction in Australopithecus afarensis, 3.86 MaThe idea that there was a loss of functional olfactory receptor (OR) genes in Australopithecus, as a result of geographical isolation on the Danakil micro-continent, and a speciation to forage from…johan-nygren (63)in bipedal • 7 years agoOn the hypothesis memes as a byproduct of loss of olfactionThe mammalian sense of smell is governed by the largest gene family, which encodes the olfactory receptors (ORs). The gain and loss of OR genes is typically correlated with adaptations to various…johan-nygren (63)in bipedal • 7 years agoMapping the Kolpochoerus (Suidae) lineage to the tectonic migration of DanakilThe fossil record of speciation as a result of geographical isolation, would follow the movement of Danakil. Within the Kolpochoerus lineage on Danakil, the earlier K. deheinzelini , is…johan-nygren (63)in bipedal • 7 years agoChimpanzee-human-last-common-ancestor split as a result of geographical isolation on DanakilBased on the hypothesis that the chimpanzee-human-last-common-ancestor (CHLCA) split resulted from geographical isolation on the Danakil micro-continent (where species endemic to the Pliocene Afar…
