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.
Some critics, particularly religious fundamentalists, argue that neither fossils nor dating can be trusted, and that their interpretations are better.Unformatted text preview: Half life of the isotope Half-life Examples of the chronometric dating techniques: Potassium – Argon Technique o 40 K à 40 Ar isotope Half-life of 1.25 billion years o Carbon-14 o 14 C is an isotope of 12 C o 14 N ßà 14 C 12 Anthropology 1001 Exam 2 Half –life of 14 C is 5,730 years Plate Tectonics The position of land masses are not constant, but change over time. North America and Europe were connected to one another by Greenland during Paleocene and Eocene.Helps to explain geographical distribution of early primates.Dating techniques are procedures used by scientists to determine the age of an object or a series of events.The two main types of dating methods are relative and absolute.Madagascar was an island long before the emergence of primates.Best theory is that lemurs colonized Madagascar by crossing the Mozambique Channel on floating of masses of vegetation. America by monkeys o How did monkey colonize South America?Early geologists, in the 1700s and 1800s, noticed how fossils seemed to occur in sequences: certain assemblages of fossils were always found below other assemblages. Since 1859, paleontologists, or fossil experts, have searched the world for fossils.In the past 150 years they have not found any fossils that Darwin would not have expected.South America was an island continent long before the emergence of primates, and the Isthmus of Panama connected North and South America only about 2 million years ago.Best theory is that the ancestor of New World monkeys colonized South America by crossing either the Caribbean Sea or Atlantic Ocean on floating of masses of vegetation.