Some of them have birth marks and birth defects at very same locations as the lethal injury causing their often abrupt and violent past life death. Eg. Born with 5 missing fingers after a prior life accident where they were cut off... Birthmarks at the exact location where they got gunshot wounds in their prior life, which could be confirmed from the autopsy report of their deceased individuality. Furthermore: Some can speak a language they never have learnt in this life (xenoglossy) corresponding to their past life language & nationality.
They can in some cases remember names of siblings and other family members in their past life family who they never have met in this life...
The pioneer on this research was the late Dr Ian Stevenson:
He founded The Division of Perceptual Studies at the Department of Psychiatry & Neurobehavioral Sciences at the University of Virginia, in Charlottesville, VA.
Selected Ian Stevenson Bibliography:
(1974). Twenty Cases Suggestive of Reincarnation (second revised and enlarged edition). University of Virginia Press.
(1974). Xenoglossy: A Review and Report of A Case. University of Virginia Press.
(1975). Cases of the Reincarnation Type, Vol. I: Ten Cases in India. University of Virginia Press.
(1978). Cases of the Reincarnation Type, Vol. II: Ten Cases in Sri Lanka. University of Virginia Press.
(1980). Cases of the Reincarnation Type, Vol. III: Twelve Cases in Lebanon and Turkey. University of Virginia Press.
(1983). Cases of the Reincarnation Type, Vol. IV: Twelve Cases in Thailand and Burma. University of Virginia Press.
(1984). Unlearned Language: New Studies in Xenoglossy. University of Virginia Press.
(1997). Reincarnation and Biology: A Contribution to the Etiology of Birthmarks and Birth Defects. Volume 1: Birthmarks. Volume 2: Birth Defects and Other Anomalies. Praeger Publishers.
(1997). Where Reincarnation and Biology Intersect. Praeger Publishers (a short, non-technical version of Reincarnation and Biology).
(2000). Children Who Remember Previous Lives: A Question of Reincarnation (revised edition).
(2003). European Cases of the Reincarnation Type. McFarland & Company.
Summarized in the recent:
Science, the Self, and Survival after Death: Selected Writings of Ian Stevenson
by his colleague, Emily Williams Kelly:
Ian Stevenson was a prominent and internationally-known psychiatrist, researcher, prolific author, and well-regarded figure in the field of psychical research. Science, the Self, and Survival after Death: Selected Writings of Ian Stevenson is the first book devoted to surveying the entirety of his work and the extraordinary scope and variety of his research. He studied universal questions that cut to the core of a person's identity: What is consciousness? How did we become the unique individuals that we are? Do we survive in some form after death? Stevenson's writings on the nature of science and the mind-body relationship, as well as his empirical research, demonstrate his strongly held belief that the methods of science can be applied successfully to such humanly vital questions. Featuring a selection of his papers and excerpts from his books, this collection presents the larger context of Stevenson's work and illustrates the issues and questions that guided him throughout his career. Our esteemed colleague, Emily Williams Kelly, is the editor of this collection of Dr. Stevenson's writing.