Researchers from the University of Otago in New Zealand working in remote Cambodian mountains are shedding new light on the lost history of an unidentified people by studying their enigmatic burial rituals.

Scientists on Tuesday published in the Journal of Vertebrate Paleontology their work on a completely reconstructed fossil of a giant penguin that lived in New Zealand some 25 million years ago, work that will give researchers insight into prehistoric penguin diversity.

Researchers at University of Otago in New Zealand have found that pigeons are able to learn abstract rules about numbers, an ability that until now had been demonstrated only in primates.

MESQUITE, Texas, Nov.

PHOENIX, Aug. 29, 2011 /PRNewswire/ -- On Sept.