Do you sneeze in sunlight? It's called PSR and scientists are perplexed / Spring allergies are back. Here's how to check pollen levels and keep from sneezing / Pollen peril: how heat, thunder and smog are creating deadly hay fever seasons / "Pollen poles" can help hayfever sufferers to cover up in time / How to make your home a sneeze-free space this hay fever season / Can sunlight really make you sneeze? Read more to know the surprising reason behind this occurrence / Nothing to sneeze at: Experimental model shows pollen can change the weather