C-14 is produced in the upper atmosphere when nitrogen-14 (N-14) is altered through the effects of cosmic radiation bombardment (a proton is displaced by a neutron effectively changing the nitrogen atom into a carbon isotope).
The new isotope is called "radiocarbon" because it is radioactive, though it is not dangerous.
The skeleton presents a small skull akin to that of non-hominin apes, plus evidence of a walking-gait that was bipedal and upright, akin to that of humans (and other hominins); this combination supports the view of human evolution that bipedalism preceded increase in brain size.
"Lucy" acquired her name from the song "Lucy in the Sky with Diamonds" by The Beatles, which was played loudly and repeatedly in the expedition camp all evening after the excavation team's first day of work on the recovery site.
Proposed calculations of the date of creation, using the Masoretic from the 10th century – 18th century include: Marianus Scotus (4192 BC), Maimonides (4058 BC), Henri Spondanus (4051 BC), Benedict Pereira (4021 BC), Louis Cappel (4005 BC), James Ussher (4004 BC), Augustin Calmet (4002 BC), Isaac Newton (4000 BC), Johannes Kepler (27 April, 3977 BC) [based on his book Mysterium], Petavius (3984 BC), Theodore Bibliander (3980 BC), Christen Sørensen Longomontanus (3966 BC), Melanchthon (3964 BC), Martin Luther (3961 BC), John Lightfoot (3960 BC), Cornelius Cornelii a Lapide (3951 BC) Joseph Justus Scaliger (3949 BC), Christoph Helvig (3947 BC), Gerardus Mercator (3928 BC), Matthieu Brouard (3927 BC), Benito Arias Montano (3849 BC), Andreas Helwig (3836 BC), David Gans (3761 BC) and Gershom ben Judah (3754 BC).
Creationists have always agreed that there is variation within species.
This is how carbon dating works: Carbon is a naturally abundant element found in the atmosphere, in the earth, in the oceans, and in every living creature.
C-12 is by far the most common isotope, while only about one in a trillion carbon atoms is C-14.
Shai Cherry of Vanderbilt University notes that modern Jewish theologians have generally rejected such literal interpretations of the written text, and that even Jewish commentators who oppose some aspects of science generally accept scientific evidence that the Earth is much older.
Many of the earliest Christians who followed the Septuagint calculated the date of creation to be around 5500 BC, and Christians up to the Middle Ages continued to use this rough estimate: Clement of Alexandria (5592 BC), Sextus Julius Africanus (5501 BC), Eusebius (5228 BC), Jerome (5199 BC) Hippolytus of Rome (5500 BC), Theophilus of Antioch (5529 BC), Sulpicius Severus (5469 BC), Isidore of Seville (5336 BC), Panodorus of Alexandria (5493 BC), Maximus the Confessor (5493 BC), George Syncellus (5492 BC) and Gregory of Tours (5500 BC).