Reaction of vinegar and baking soda [video]

Low mag Some baking soda was placed on a glass slide and covered with a cover glass, then a dropper was used to place some vinegar on the slide. The vinegar was sucked under the cover glass by capillary action and reacted with the backing soda.

Human Sperm [video]

High mag Human semen sample on glass slide with coverglass, approximately 10 minutes after ejaculation.