grammy award winning singer, songwriter angelique kidjo >> music transforms lives of people >> inspiringtrength >> read, be curious your brain is your ultimate weapon >> hope for the future >> the only thing that can transform my continent is girl's education >> talk to aljazeera only on al jazeera america [ ♪ music ] >> hey, welcome back to "techknow". i wept 10 miles away from here. there's a place called la brea tar pits, and you may have smelt it, that is methane gas. besides the smell it's a gold mine for scientists. the fossils they are uncovering in the area are unlike any other place in north america, and they are uncovering mysteries of the past and giving us an idea of our global warming future. it's all from digging out a subway in l.a. let's check it out. [ ♪ music ] . >> reporter: it's called the miracle mile, a stretch of los angeles defined by deco cool and modern museums. now its future is defining it's prehistory orric past. >> we've gone down 70 feet, 330,000 years. >> from the sub way to the sea - a treasure trove of ancient goodies has been uncovered, proving the sea