![immune](https://assets.shortpedia.com/uploads/2022/12/30/1672398480.webp?tr=w-1200,h-600,cm-pad_resize,bg-F3F3F3)
Make sure you're getting enough vitamin D to maintain your immune system operating at its peak.
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Students who write longhand notes remember more and have a deeper understanding of the material than those who take notes from laptop.
![Persians](https://assets.shortpedia.com/uploads/2022/11/05/1667641826.webp?tr=w-1200,h-600,cm-pad_resize,bg-F3F3F3)
Persians were also recognised as innovators in the fields of refrigeration, cooling, and ventilation.
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Did you Know? Greek Fire, a weapon of the Eastern Roman Empire, was utilised in ship-mounted flamethrowers.