Science Quickies 3

A new study in mice shows that increased calcium sensitivity in the heart can lead to an irregular heartbeat. 

Scientists have identified 13 new tumor-suppressing genes in liver cancer. 

Scientists have calculated what they believe is the fastest 100-meter sprint time humanly possible. This was done using a mathematical model, and the time was found to be 9.48 seconds. 

A meteor streaking across parts of Canada last week was caught on video: