* Hormone inspires animal 'babysitting':
Researchers have long turned to animals to study how cooperation evolved. New findings highlight the role of hormones, they say.
* Scientists to probe ethical complaint over 'hand-
A Turkish scientists' group announced plans to look into ethical complaints against three U.K. researchers, who meanwhile broke a long silence on the case.
* Study examines how humans are still evolving:
Scientists report finding more than 700 genetic variants that evolution may have favored in the past 10,000 years.
* Saturn moon may have liquid water:
Researchers say evidence of water reservoirs erupting in geysers on the moon Enceladus may expand the search for alien life.
* Researchers develop method to view Sun's far side:
A new technique is said to make the Sun's hidden face fully visible for the first time.