Basic Instincts
A genteel disquisition on love and lust in the animal kingdom
Enter the weird world of the echidna—a mammal in a category all its own
Why these seabirds stage a rowdy springtime love-in
When mating season arrives, these frogs melt
For Atlantic horseshoe crabs, love is a battlefield
This sea slug’s mating ritual ends with a stab to the head
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