This is a hole in your skin after a needle punctures it, as seen from a scanning electron microscope. : r/Damnthatsinteresting
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Hole‐in‐the‐head disease in discus fish, Symphysodon (Heckel, 1840): Is it a consequence of a dietary Ca/P imbalance? - Amesberger‐Freitag - 2019 - Journal of Fish Diseases - Wiley Online Library
Visualization of synaptic domains in the Drosophila brain by magnetic resonance microscopy at 10 micron isotropic resolution | Scientific Reports
What you need to know about hole in the head disease - Practical Fishkeeping
Parts of a Microscope with Their Functions – Microbe Online
Hole In The Head Disease (HITH) - Causes and how to treat, Oscar cichlids with HITH - YouTube
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A fragment of a circular massage comb under a microscope. There are visible pins for combing hair, holes for pins and hair on the surface of the comb Stock Photo - Alamy
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THE MOST BEAUTIFUL PIMPLE UNDER A MICROSCOPE! - YouTube
The head of a tapeworm under an electron microscope | Things under a microscope, Electron microscope, Electrons
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Hole in the Head, HITH, Hexamitiasis (Hex) Disease in Fish,
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Hole In The Head Disease (HITH) - Causes and how to treat, Oscar cichlids with HITH - YouTube
Hole in the Head Disease
Hole in the Head Disease
World's largest atom smasher could seed microscopic black holes | Live Science
Microscope
Hole‐in‐the‐head disease in discus fish, Symphysodon (Heckel, 1840): Is it a consequence of a dietary Ca/P imbalance? - Amesberger‐Freitag - 2019 - Journal of Fish Diseases - Wiley Online Library
Hole in the Head (HITH) and Head and Lateral Line Erosion (HLLE) in Aquarium Fish – Advanced Aquarium Concepts
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Hole In The Head Disease in Fish: Causes & Treatment | PetCoach