Does a green laser pointer stop working when it is cold? Or does it turn into an invisible laser? That is nice to know for safety reasons if you are using a green laser pointer to point out stars on a... continue reading
posted by blacklotus90 3 years 7 months 2 weeks ago • 811 views • 9:01search results matching tag: infrared
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YouTube: Eyes have been around for a long time, like... half a billion years or so... and in that time, animals have evolved lots of crazy and amazing ways to observe the world around them!
posted by PlayhousePals 8 years 1 week ago • 403 views • 8:42- 1