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=Who is Ardi and what are her specificities?= | =Who is Ardi and what are her specificities?= | ||
Ardi is the nickname given to an almost completed female skeleton. She belongs to the species of ''Ardipithecus ramidus.'' Palaeoanthropologists have discovered a set of teeth and more than 100 fossil fragments. The skeleton of Ardi reveals many anatomical characteristics. First, many features show that the organsim could move in a bipedal way and at the same time, it shows features really close to the ones in many apes (strong leg muscles that help to climb trees). Ardi also has hands that don't seem really adapted for climbing. Her feet on the other hand are not well adapted for walking but practical for climbing and grabbing tree branches. This species shows also a little difference in the anatomy of male and female organisms. The males were a bit bigger and their canines were also slighlty larger than the females. --LiljaP | Ardi is the nickname given to an almost completed female skeleton. She belongs to the species of ''Ardipithecus ramidus.'' Palaeoanthropologists have discovered a set of teeth and more than 100 fossil fragments. The skeleton of Ardi reveals many anatomical characteristics. First, many features show that the organsim could move in a bipedal way and at the same time, it shows features really close to the ones in many apes (strong leg muscles that help to climb trees). Ardi also has hands that don't seem really adapted for climbing. Her feet on the other hand are not well adapted for walking but practical for climbing and grabbing tree branches. This species shows also a little difference in the anatomy of male and female organisms. The males were a bit bigger and their canines were also slighlty larger than the females. --LiljaP | ||
{{co|Nice Lilja but please sign your text with the right signature.}}[[Utilisateur:Pierre.brawand|Pierre.brawand]] ([[Discussion utilisateur:Pierre.brawand|discussion]]) 31 mars 2020 à 21:53 (CEST) | |||
=New Question= | =New Question= | ||
Version du 31 mars 2020 à 21:53
How to date fossil remains?
There are two ways to date fossil remains: relative dating and physical dating.
The first method calculates the layers and the origin of the deposits on the fossil.
The second method uses natural clocks (that use physical properties) to calculate how much time has passed since the organism has died.
The most famous method is called radiocarbon dating which detects carbon-14 (which is a form of carbon). By measuring the amount of carbon-14 left in the deceased organism, we can determine when the organism died. Another technique that combines relative and physical dating is palaeomagnetism. It uses the Earth's magnetic poles and the position at which they were when the organism died, allowing us to calculate at which period of time that was. --LiljaP
Nice but please, sign so we know who wrote this textPierre.brawand (discussion) 30 mars 2020 à 16:43 (CEST)
How do we know that Orrorin tugenensis was a hominin?
The main proof is found by looking at the shape and anatomical features of the leg bones. The femur of Orrorin tugenensis ressembles that of Australopithecus and other fossil apes from the Miocene with its unique shape, i.e. a long and flat femoral neck, implying that it was a bipedal. However, the dentition and powerful arms of Orrorin tugenensis indicate some similarities with apes, which leaves somewhat of a nuance to this argument. --GavinC (discussion) 30 mars 2020 à 16:43 (CEST)
GoodPierre.brawand (discussion) 30 mars 2020 à 16:44 (CEST)
Who is Ardi and what are her specificities?
Ardi is the nickname given to an almost completed female skeleton. She belongs to the species of Ardipithecus ramidus. Palaeoanthropologists have discovered a set of teeth and more than 100 fossil fragments. The skeleton of Ardi reveals many anatomical characteristics. First, many features show that the organsim could move in a bipedal way and at the same time, it shows features really close to the ones in many apes (strong leg muscles that help to climb trees). Ardi also has hands that don't seem really adapted for climbing. Her feet on the other hand are not well adapted for walking but practical for climbing and grabbing tree branches. This species shows also a little difference in the anatomy of male and female organisms. The males were a bit bigger and their canines were also slighlty larger than the females. --LiljaP
Nice Lilja but please sign your text with the right signature.Pierre.brawand (discussion) 31 mars 2020 à 21:53 (CEST)
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