16 years: how long this new prototype hormonal birth control implant is designed to last. A remote control lets users click the implant on or off, depending on whether they want to get pregnant at a certain time.
91 percent: similarity between the proteins found on the surface of dog tumors and on the surface of human tumors. The discovery helped researchers develop the first antibody therapy for canine cancer.
*This article originally stated, incorrectly, that there have been 1700 peer-reviewed safety studies. The correct number is 1783.