Which of the following discoveries happened most recently?

first type of contact lens
first open heart surgery
laser eye surgery
measles vaccine

Hey your answer should b c

C= $20.45, you do how many songs multiply that by each song cost and add $9.95

Bmust be the answer, as technically all organs move, so a is incorrect. all organs are made of different types of cells, so that isn’t a problem, so c is also incorrect. human hearts are very similar to many other animals’ hearts, so d is also incorrect, yet the heart is made of muscle, which is hard to grow in the lab so it would be correct to say b

So that you don't get baby's but also prevents stis such as hiv