the d.n.a. of the babies to prevent them from contracting hiv the methods have been used on plants and animals but never before on humans the university where he works has distanced itself from the west saying it violates ethical standards. general motors says it's laying off fourteen thousand workers and closing up to five plants in north america the car maker called for the restructuring to focus more on autonomous and electric vehicles. after a tense wait touchdown. mission team members best into applause when nasa is inside land a touchdown safely on the surface of mars the probe is designed to barrel into the martian soil and collect data on how the red planet formed. my.