Scratch and Sniff: Feather Louse Sex Ratio Skewed by Citrus Scent of Seabird

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By Meredith Swett Walker Humans are a species where males and females are pretty equal — at least numerically. The number of boys born is roughly equal to the number of girls — a ratio of 1:1. Even if you look at the entire population of humans, not just newborns, the sex ratio is still […]

Removing Head Lice Eggs with Ordinary Conditioner is Just as Effective as Using Special Products

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Eggs from head lice, also called nits, are incredibly difficult to remove. Female lice lay eggs directly onto strands of hair, and they cement them in place with a glue-like substance, making them hard to get rid of. In fact, the eggs are glued down so strongly that they will stay in place even after […]