Russian military advisors have arrived in Mali in recent weeks amid tensions with Western powers ove … (www.france24.com)

Down syndrome is the most common genetic disorder, impacting about 1 in 700 newborns around the worl … (www.statnews.com)

During long portions of the past 2.4 billion years, the Earth may have been more inhospitable to lif … (www.leeds.ac.uk)