Recent comments in /f/askscience

saywherefore t1_jckuspk wrote

Reply to If UV radiation is used to disinfect and sterilise things then why isn't everything the sun touches (your skin, the sidewalk etc) sterile? by Critwhoris

Sunlight can be a useful tool for sterilising things. For example you can sterilise water by leaving it in bright sunlight in a plastic bottle. Or you can put a mattress in the sun to reduce the number of mites in it.

Think about how sunlight bleaches fabrics and other materials that are left out for an extended period - that is the same mechanism at work.

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TheCrafter1205 t1_jckt6ml wrote

Reply to How would a scientist be able to tell the difference between a blood sample from two totally different animals? by EastClintwood89

The first time forensics was used in a court, a farmer was accused of killing someone, and claimed that the blood on his clothing was pig’s blood. Someone took a sample of the blood, and looked at it under a microscope. Mature human red blood cells do not contain a nucleus, while pig red blood cells do. When he looked under the microscope, there were no nuclei, and this was used to help win the case.

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arettker t1_jckky0f wrote

Reply to comment by StaffMental6035 in Does regularly taking aspirin reduce its effectiveness to reduce pain? by tiltedpyramid

When used properly there’s likely little to no negative long term effects

Taken in high doses you have liver issues with Tylenol and stomach/GI bleeding risk with Ibuprofen/aspirin

Low doses of aspirin reduce your risk of heart attack/stroke when taken daily and increase your risk of GI bleed

Some studies have shown a link between long term Tylenol use and early mortality, increased risk of heart attack, etc. however all these were observational studies with many confounding variables (for example someone who takes Tylenol daily is likely less healthy than someone who doesn’t need Tylenol daily so they may have a higher risk of death at baseline)

Basically if you don’t have any comorbidities or other risk factors and follow the directions on the package you’ll be fine and not experience any damages to your body. If you already have severe kidney or liver disease you probably should be more cautious

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-Raskyl t1_jckefwj wrote

Reply to comment by [deleted] in How would a scientist be able to tell the difference between a blood sample from two totally different animals? by EastClintwood89

Ummm.... this isn't true. Iguanas have red blood.

There is a genus of skinks that have green blood. But they are the only lizards I know of that don't bleed red. And technically there blood is red, but has so much biliverdin in it (a byproduct of hemoglobin break down) that it looks green.

Iguanas have been hunted and eaten for hundreds if not thousands of years. They bleed red. You can Google and find pictures of ones with scrapes on their sides, and they are bleeding red. Who told you they bled whatever color they were?

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