Now, when I did that, I made a pretty big assumption, and some you all have touched on this in the comments on You Tube on the last video, is how do I know that this estimate I made is based on the assumption that the amount of carbon-14 in the atmosphere would have been roughly constant from when this bone was living to now?And so the question is, is the amount of carbon-14 in the atmosphere and in the water, and in living plants and animals, is it constant?
Erin Blakemore is a Boulder, Colorado-based author and historian.
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Penny shows Koko videos of male zoo gorillas, so that she can select the one(s) she is most attracted to. After a while, Koko sees Ndume on the screen, and gives the screen a big kiss — he's obviously the one.
And so it's kind of a record of the atmosphere up to 10,000 years. Those are the speleothems that are coming from the top of the cave.
If you want to go even further back, you can look at cave deposits, and the fancy word for these cave deposits are speleothems. But the reason why these are useful is these are formed by calcium carbonate, so they have carbon in them, and slowly over, really, tens of thousands of years, the water in the cave deposits that calcium carbonate. Inscriptions, distinctive markings, and historical documents can all offer clues to an artifact's age.And if the artifact is organic—like wood or bone—researchers can turn to a method called radiocarbon dating. " Woody decides to ask Ann Davis, who, the narrator points out, "knows how to have a good time." With her perpetual squint and chipmunk cheeks, Ann (pronounced "Ay-yun" by the actors in this film) is the perfect companion for super-nerd Woody.This kid is destined for great things such as taking someone's eye out with a dart. :) I swear, the guy who is running the Balloon/Dart Booth looks like Jack Webb in disguise! films like this did NOTHING to make anyone feel better about their fears of looking stupid in social situations.This right can be revoked at any time and for any reason.