sci mags
Get flash to fully experience Pearltrees
The changing face of numerals: Brahmi numerals from India (top); Arabic-Indic numerals, developed and popularised by al-Khwarizmi; and the numerals we use today (bottom)
Top 10 ancient Arabic scientists | COSMOS magazine
"How did a suicidal robot end up here?" It had taken over 20 years of painstaking preparation and research to plan his suicide.