Recent comments in /f/askscience

franktheguy t1_jcs8o0n wrote

Reply to What causes raised ridges in human fingernails/toenails? by afcagroo

Several of the comments are referring to bands that run width-wise across the nail instead of lengthwise like you are describing. I personally do have the lengthwise ridges and my rheumatologist says it is a distinctive feature of autoimmune diseases such as rheumatoid arthritis.

An example article: https://www.healthline.com/health/rheumatoid-arthritis/rheumatoid-arthritis-nail-changes

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Sarmelion t1_jcs8en7 wrote

Reply to When we film creatures in the deep ocean, are we hurting them with our lights (perhaps even blinding them)? by Crushingit1980

When they first went down there yes, but after we realized that we started using special cameras and lenses and such to take video in extremely low light conditions so we wouldn't disrupt the environment we were studying.

There's another really great post on this https://www.reddit.com/r/askscience/comments/2n1yd4/comment/cm9t27t/?utm_source=share&utm_medium=web2x&context=3

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