Final answer:
The Lagar Velho Boy is the name given to the fossilized remains of a young human from about 24,500 years ago, showcasing both Neanderthal and modern human features.
Step-by-step explanation:
The Lagar Velho Boy refers to the skeletal remains of a juvenile human who lived approximately 24,500 years ago, discovered in Portugal in 1998. The remains are significant as they present a mixture of Neanderthal and modern human traits, offering valuable insights into the interactions between these two populations. The significance of the Lagar Velho Boy is multi-faceted, including his potential to provide clues about human evolution, evidence of interbreeding between Neanderthals and modern humans, as well as revealing aspects of the Paleolithic period lifestyle and burial practices.