Chloroplasts should not be able to work once they are removed from algal cells because those cells contain proteins that control their operation.
The reason it's smarter to store your eggs with the fat end up is that the egg itself does not completely fill the interior of the shell.
The most common hypothesis why birds' eggs are speckled is that the speckles help camouflage the eggs, making them harder for predators to see.
Until very recently, humans tended to reproduce before reaching full adult maturity, as did the dinosaurs. Learn more on this Moment of Science.
If you've ever made a cream pie and it turned into a soupy disaster overnight, then you know about this common frustration.
As part of the mating process, female giant water bugs latch onto male water bugs and cement as many as one hundred and fifty eggs to his back, then leaves.
Brown-headed cowbirds are robin-sized black birds whose range covers most of North America. From a people’s point of view cowbirds are what we might call deadbeat parents. Cowbirds lay their eggs in the nests of other bird species, and the cowbird nestlings are raised by the foster parents. Since the cowbirds spend their formative months with birds of an entirely different species which has separate habits, songs, etc., how does a cowbird know it’s a cowbird? Learn more on this Moment of Science.
Have you heard of humming fish? Learn more on this Moment of Science.
Bald eagles are not longer an endangered species. Learn more on this Moment of Science.
Certain species of male moths use toxins to protect themselves during sex. Learn more on this Moment of Science.