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Science News for January 10, 2001


New fossil study rejects 'Eve theory'

A University of Michigan study finds that ancient human fossils from Australia and Europe show distinctive characteristics to an older African population, contradicting the 'Eve theory'. The research suggests that multiple groups of humans survived and thrived globally, rather than a single ancestral group replacing others.

SourceUniversity of Michigan·JournalScience·DateJan 10, 2001

Oldest crystal reveals early Earth

Researchers have discovered a 4.4-billion-year-old zircon crystal that suggests the early Earth had a low-temperature environment with water and conditions suitable for life. The findings contradict conventional wisdom, which predicted a magma ocean, and may indicate the Earth cooled faster than thought.

Hopkins Children's Center researchers find cause for common kind of dwarfism

Researchers at Johns Hopkins Children's Center found a faulty releasing hormone receptor gene in three families with isolated growth hormone deficiency type 1-B, the most common type of growth hormone-deficient dwarfism. The study suggests that this condition is not caused by a defect in human growth hormone production.

SourceJohns Hopkins Medicine·JournalThe Journal of Clinical Endocrinology & Metabolism·DateJan 10, 2001

Model aims to help recyclers curb high-tech trash

A new computer recycling model developed by Purdue University's Julie Ann Stuart can help recyclers determine the economic viability of processing bulk materials. The model takes into account factors such as metal prices and helps prevent financial losses for recyclers.

SourcePurdue University·JournalIEEE Transactions on Electronics Packaging Manufacturing·DateJan 10, 2001