HumansÂé¶¹´«Ã½â€™s guide to the 21 best ideas of the 21st century A quarter of a century in, this is our definitive pick of the ideas in science and technology that are already transforming the world Features
HumansOldest evidence of fire-lighting comes from early humans in Britain An excavation in Suffolk, UK, has uncovered pyrite and flint that appear to have been used by ancient humans to light fires some 400,000 years ago News