One rare form has atoms that are 14 times as heavy as hydrogen atoms: carbon-14, or C ratio gets smaller.
They were made by all previous members of the genus, starting with relatively crude tools made by Homo habilis and Homo erectus.
In Europe, the large-brained Neanderthal Man (Homo neanderthalensis) made tools of high quality, and was in turn outshone by the many tools made by our own species.
The age ended when humans began to make small, fine tools (Mesolithic) and finally when plant crops and have other types of agriculture (Neolithic).
In some areas, such as Western Europe, the way that people lived was affected by the Ice age.
For example, creationist writer Henry Morris [Morris2000, pg.
C) dating usually want to know about the radiometric dating methods that are claimed to give millions and billions of years—carbon dating can only give thousands of years.
[Click for Main Data] Most of the isotope data on this site has been obtained from the National Nuclear Data Center.
In a related article on geologic ages (Ages), we presented a chart with the various geologic eras and their ages.
People wonder how millions of years could be squeezed into the biblical account of history. Christians, by definition, take the statements of Jesus Christ seriously.
Clearly, such huge time periods cannot be fitted into the Bible without compromising what the Bible says about the goodness of God and the origin of sin, death and suffering—the reason Jesus came into the world (See Six Days? He said, This only makes sense with a time-line beginning with the creation week thousands of years ago.
Atoms of the same element that have different numbers of neutrons are called isotopes. Most carbon on Earth exists as the very stable isotope carbon-12, with a very small amount as carbon-13.