Guest: Patricia Lakin-Thomas, York University professor It is time to spring forward! Daylight Saving Time begins this weekend. Clocks shifting ahead an hour on Sunday not only may make you feel a little tired, it’s a much bigger deal than you may think.  To some scientists, changing the time twice a year — which is not done in large parts of the world — is one of the world’s biggest experiments, and generally points to negative outcomes like an increase in heart attacks and traffic accidents. The problems don’t end there and thus, there are movements to abolish it. Today we speak to Patricia Lakin-Thomas, a York University biology professor who runs the Clock Lab.