'Around 3500 B.C. people were mixing copper & arsenic to make this; they soon found copper & tin worked better'
bronze
ELEMENT-ARY SCHOOL: Around 3500 B.C. people were mixing copper & arsenic to make this; they soon found copper & tin worked better
Around 3500 B.C. people were mixing copper & arsenic to make this; they soon found copper & tin worked better
Around 3500 B.C. people were mixing copper & arsenic to make this; they soon found copper & tin worked better
ELEMENT-ARY SCHOOL
bronze
ELEMENT-ARY SCHOOL