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    I'd sooner believe Audrina is friends with the Flintstones' pet dinosaur, Dino, than this flagrant chicanery. "Break-Up to Make-Up" (Season 6, Episode 9) Mc Kaela? I keep forgetting she's on this show, but congrats on the sobriety. "Young Hollywood" (Season 3, Episode 13) Heidi spends a lonely 21st-birthday party with just Spencer. The Di Mera family of needs to get their mojo back. We're still involved in the same romantic entanglements of Brody and Audrina and Kristin, and now Stephanie is trying to date while sober. Now Heidi can fall for the true love of her life, Spencer Pratt. "Big Girls Don't Cry" (Season 3, Episode 2) The first appearance of Justin Bobby! Maybe Spencer and Lauren are more alike than they want to admit. "New Year, New Friends" (Season 2, Episode 9) It's New Year's and Heidi is still torn between Spencer and Lauren, but on a positive note, Lo Bosworth has finally joined the cast (in a supporting role for now, but the world, and yet, somehow, she still can't find an interesting story line. "For Better or Worse" (Season 3, Episode 8) Lauren thought she was gonna get cozy with Jason again, but surprise, he has a girlfriend and he's engaged. I know the show has always been used to cross-promote bands, but this is egregious. The star stripped down to some revealing black underwear as she posed and preened for her Snapchat followers. Our lesbian chat room is quickly becoming a popular destination for gay women online. We wanted to make sure there was a place where women can feel comfortable chatting, talking and camming with other women.


    Dating of fossil dating stories blog

    Fossils are generally found in sedimentary rock — not igneous rock.Sedimentary rocks can be dated using radioactive carbon, but because carbon decays relatively quickly, this only works for rocks younger than about 50 thousand years.By looking at the ratio of carbon-12 to carbon-14 in the sample and comparing it to the ratio in a living organism, it is possible to determine the age of a formerly living thing fairly precisely. So, if you had a fossil that had 10 percent carbon-14 compared to a living sample, then that fossil would be: t = [ ln (0.10) / (-0.693) ] x 5,700 years t = [ (-2.303) / (-0.693) ] x 5,700 years t = [ 3.323 ] x 5,700 years Because the half-life of carbon-14 is 5,700 years, it is only reliable for dating objects up to about 60,000 years old.However, the principle of carbon-14 dating applies to other isotopes as well.

    Current understanding of the history of life is probably close to the truth because it is based on repeated and careful testing and consideration of data.

    The use of various radioisotopes allows the dating of biological and geological samples with a high degree of accuracy.

    However, radioisotope dating may not work so well in the future.

    Potassium-40 is another radioactive element naturally found in your body and has a half-life of 1.3 billion years.

    Other useful radioisotopes for radioactive dating include Uranium -235 (half-life = 704 million years), Uranium -238 (half-life = 4.5 billion years), Thorium-232 (half-life = 14 billion years) and Rubidium-87 (half-life = 49 billion years).

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