<Ul> <Li> <P> Stairs of Kalasasaya (1903) </P> </Li> <Li> <P> Temple of Kalasasaya (1903) </P> </Li> <Li> <P> Gate of the Sun (1903) </P> </Li> <Li> <P> Gate of the Sun, Rear View (1903) </P> </Li> </Ul> <Li> <P> Stairs of Kalasasaya (1903) </P> </Li> <P> Stairs of Kalasasaya (1903) </P> <Li> <P> Temple of Kalasasaya (1903) </P> </Li>

Which of the following was found to be significant in the skulls from peoples of the tiwanaku empire