Karl Gruber

Animal Without a Brain Can “Sneeze,” Surprising Study Shows

By Karl Gruber They don’t exactly say achoo, but sponges can “sneeze,” according to a new study that shows the simple aquatic creatures are more complex than previously thought.  Sponges are stationary animals, found in both marine and fresh ...

Animal Without a Brain Can “Sneeze,” Surprising Study Shows

By Karl Gruber They don’t exactly say achoo, but sponges can “sneeze,” according to a new study that shows the simple aquatic creatures are more complex than previously thought.  Sponges are stationary animals, found in both marine and fresh ...

Dogs Sense Earth’s Magnetic Field

Dogs don’t need a compass: Your best friend can sense Earth’s magnetic field, say researchers who report that dogs preferentially align themselves facing north or south to do their business. Dogs are well known for their excellent sense ...

Poison Frogs Make Their Babies Toxic, Too

By Karl Gruber Strawberry poison frogs (Oophaga pumilio) of Costa Rica give their newborn tadpoles a built-in weapon against predators: alkaloids. Various animals and plants use alkaloids—naturally occurring, bitter-tasting chemical compounds—as a first line of defense. For instance, ...

Poison Frogs Make Their Babies Toxic, Too

By Karl Gruber Strawberry poison frogs (Oophaga pumilio) of Costa Rica give their newborn tadpoles a built-in weapon against predators: alkaloids. Various animals and plants use alkaloids—naturally occurring, bitter-tasting chemical compounds—as a first line of defense. For instance, ...