Bearded dragons are known for being able to change their sex in increasing heat and researchers haven't known why until now. Bearded dragons are the weirdest of the reptile family, having two sex chromosomes and a temperature override that determine sex. An experiment done in Australia showed that when the lizards eggs are incubated below 32 degrees Celsius, dragons with two Z chromosomes develop as male while dragons with one Z and one W develop as female. However, when the temperature increases above 32 degrees Celsius, the male ZZ dragons will develop as female. The researchers found that the sex-reversed female dragons increase the activity of two of their genes. These two genes have been linked to sex differentiation in many other animals. Changes in the dragons RNA were also found. Certain sections of RNA that would normally be removed remained. These sections contained stop codons which prematurely ended the RNA sequence, thus allowing the sex change.