pixiv Encyclopedia has updated the Privacy Policy as of June 13, 2023. Revision history
Mammals (哺乳類), meaning breast in Latin are group of organisms included in the mammaliaformes class. It is characterized by many organisms with very high intelligence.
The class use the word breast because they are the only animals that produce milk for their young by the mammary glands (breast). Oddly when it comes to birth, most don't lay eggs, yet some do such as the platypus and echidna.
0/3000
About issues in articles
If you find something off in an article, please go ahead and edit it yourself.
If you see that someone else keeps doing illicit activities, please go to their profile and report them via the Report a problem button.
Reported successfully
We're collecting feedback to make pixiv Encyclopedia even better. If you have any comments or if you found any problems, please contact us.
Please note that we do not reply to Feedbacks. If you need help, please visit our Help Center.
Please do not include any personal information
Your feedback was sent successfully.
If you notice anything else, please send us your Feedback at any time.
