Latest articles by Joseph Castro
Animal Sex: How Hummingbirds Do It
Hummingbird mating involves using specialized courtship rituals, tail feathers that sing, and weaponized beaks.
Year of the Rooster: How Kauai's Feral Chickens Do It
Chicken mating involves tidbitting, wing-flapping, a male waltz and the possibility of the female ejecting the male's sperm.
Animal Sex: How Nine-Banded Armadillos Do It
Though nine-banded armadillos are solitary creatures, they do occasionally get together for some genital sniffing, tail wagging and clucking in order to have sex.
The Mysterious Sex Lives of Hawaii's Endangered Yellow-Faced Bees
Everything scientists know about these bees' mating behaviors is based on anecdotal observations.
Halloween Fright: The Unusual Sex Lives of Dark Fishing Spiders
Male dark fishing spiders spontaneously die after sex — but their nutritious bodies provide fuel for their mates to have more offspring that are larger and healthier.
Animal Sex: How Nautiluses Do It
Mating in these strange-looking mollusks lasts for 2 to 3 hours, but it's unclear what exactly is going on during this time.
Bald Eagle Sex: The Acrobatic Mating of America's National Bird
Bald eagle sex involves daring aerial moves, intricate nest building and lifelong monogamy.
Animal Mating: How Scorpions Do It
Scorpion sex usually involves peaceful dancing, but sometimes can also include stinging and cannibalism.
Animal Sex: How Red Foxes Do It
Red fox mating involves screaming, copulatory locks, and lifelong relationships.
Animal Sex: How Tarantulas Do It
Tarantula mating involves sperm webs, courtship dances, and fang clasping. And sometimes sexual cannibalism.
Velociraptor: Facts About the 'Speedy Thief'
This turkey-sized dinosaur looked very different from its 'Jurassic Park' depiction.
Stegosaurus: Bony Plates & Tiny Brain
Stegosaurus' distinctive features make it one of the most recognizable dinosaurs.
Spinosaurus: The Largest Carnivorous Dinosaur
Spinosaurus was even bigger than Giganotosaurus and Tyrannosaurus.
Giganotosaurus: Facts About the 'Giant Southern Lizard'
Giganotosaurus was one of the largest meat-eating dinosaurs.
Diplodocus: Facts About the Longest Dinosaur
Diplodocus was a long-necked, long-tailed dinosaur that roamed western North America.
Brachiosaurus: Facts About the Giraffe-like Dinosaur
Brachiosaurus stood taller than most dinosaurs.
Apatosaurus: Facts About the 'Deceptive Lizard'
For many years, this dinosaur was mistakenly called Brontosaurus.
Allosaurus: Facts About the 'Different Lizard'
Numerous fossils make this one of the most-studied dinosaurs.
Animal Sex: How Galápagos Tortoises Do It
Galápagos tortoise mating involves neck competitions, harassment and lengthy sperm storage.
Animal Sex: How Santa's Reindeer Do It
In the months preceding Christmas, Santa's sleigh-pulling ungulates are engaged in a very different activity — mating. Reindeer sex involves herding, defending harems and ignoring lovers.
Animal Sex: How Manatees Do It
Manatee sex involves rendezvous points, large mating herds and aggressive shoving.
