Wikipedia results

1.Cleavage (breasts)

2000, ISBN 9780809225835 Alexandre Arsene-Henry et al., The use of helical tomotherapy in the treatment of early stage breast cancer, Oncotarget, 2018-05-04

https://en.wikipedia.org/wiki/Cleavage (breasts)

2.United States in the 1950s

molecules that form the building blocks of life are able to spontaneously form. Francis Crick, and James D. Watson, discovered the helical structure of DNA at

https://en.wikipedia.org/wiki/United States in the 1950s