Students are introduced to the question of why Miss Sarah's shadow was shorter at lunchtime and longer the next morning. Students are asked to observe their shadow to learn more about shadows ...
CC0 Usage Conditions ApplyClick for more information. aviation air space national museum smithsonian airplane NASA Rocket Jet Discovery SR-71 Blackbird "Space Shuttle" History Science STEM astronaut ...
Eye floaters are not a sign of glaucoma, which typically causes gradual vision loss. Floaters are small dots or shapes that appear across a person’s vision. It is important to consult an eye doctor if ...
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