by Ziqi Chen figures by Rebecca Senft Have you ever travelled across time zones? If the answer is yes, you might be familiar with jet lag, a condition that results from an altered internal clock. Jet lag causes symptoms such as disturbed sleep, stomach problems, and mood swings. In recent years, emerging lines of evidence show that jet lag might also affect our immune system, and … Continue reading A Battle of Time: Biological clocks have a hand in defense against infection