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Getting the job done. A female Asian water dragon (Physignathus cocincinus) produced a daughter (left) without the assistance of a male. Skip Brown/Smithsonian’s National Zoo

Virgin births from parthenogenesis: How females from some species can reproduce without males

Parthenogenesis, a form of reproduction in which an egg develops into an embryo without being fertilized by sperm, might be more common than you realized.
Yolks are a great source of vitamins, minerals, fats and proteins packaged up by the female animal for an embryo. Emily Nunell/The Conversation CC-NY-BD

Curious Kids: why do eggs have a yolk?

A yolk allows a developing animal to stay in an egg longer, boosting its chance of survival. The downside is the mother has to work hard finding extra food so her body can create a nutritious yolk.
There’s still a lot we don’t know about why more children have food allergies today. from www.shutterstock.com

Can I prevent food allergies in my kids?

Parents are now advised to introduce foods like peanut and egg to infants before one year of age.

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