
Childhood immunizations against infectious diseases are a rite of passage, but what happens when the vaccine is supposed to protect against cancer? Texas Governor Rick Perry tried to make vaccination with Gardasil, the first drug to protect against human papillomavirus (HPV) and cervical cancer, mandatory for sixth-grade girls. At least 20 other states followed suit but without much success. Legislators rejected Perry's proposal, but perhaps he was on to something. It turns out that HPV has been linked to throat cancer. Since oral sex spreads the disease, experts note that early HPV shots could reduce the risk of oral cancer as well.
See Full ListMorality and empathy are writ deep in our genes. Alas, so are savagery and bloodlust. Science is now learning what makes us both noble and terribleand perhaps what can make us better
Here are some of the dilemmas used to study human morality. Take this quiz to see how you compare to other TIME.com readers
From Autism to Flu
From Gardasil to Migraines
From Naps to Suicide
From Tuberculosis to Zoledronic Acid