Mei Li:
Bort or boart refers to waste/inferior what, used for industrial purposes??
Shuai Zheng:
diamonds
Mei Li:
Before scattering itself over Western Australia, May 14, 1973 saw the US launch what first ever space station, which orbited the earth for 6 years, even though it was only visited 3 times??
Shuai Zheng:
skylab
Mei Li:
What kitchen tool was invented my William Lyman in 1870?
Shuai Zheng:
tin opener