
Don't forget to set your clocks an hour ahead this weekend. On Sunday at 2 a.m. daylight saving time goes into effect.
本周日凌晨2点夏令时开始。时钟调快一小时。
(Picture from the Internet)

This is the official website of the Philadelphia Science Forum, established by a group of passionate and talented scholars at the University of Pennsylvania and Children’s Hospital of Philadelphia, is open to the scientific community in and beyond Philadelphia.