This is a minor anomaly in the space-time continuum.
The laws of physics are only slightly off, but not enough to notice.
Only in this one corner of the universe, time is ticking at 0.5x speed.
Don't worry, it's just a tiny glitch.
Unless you're a scientist, then you should worry.
Hyperlinks:
Image courtesy of Bug 004: Unreliable Image Source
Disclaimer: Reality Distortion not included in the warranty.