(Image: Darmon Richter, The Bohemian Blog)
The latest instalment of our weekly link round-up features creepy optical illusions, urban exploration, the flu through the ages, impressive laser weapons and more.
The Flu Then & Now (Two Nerdy History Girls)
10 Incredible Real-Life Laser Weapons (Tech Graffiti)
Treasure Hide? History in Peril (National Geographic)
The Creepy Optical Illusions of Hikaru Cho (Environmental Graffiti)
Urban Exploration: The Furniture Hall, Bulgaria (The Bohemian Blog)