I believe it has something to do with the expansion of the yeast. I'm assuming at least the top of the bread cooks to a crust, then cracks open when it's too brittle to expand as the inside heats up.
Yeast
Dermal ridges cause the overlying epidermis to form epidermal ridges. Collectively these ridges are called friction ridges.
buffing paste
Your finger tips.
people who live on mountains generally live in tiny caves or under small ridges.
Yeast
Bread is not known to cause headaches, but certain allergic reactions to the bread could lead to headaches.
Having vertical (longitudinal) ridges on the fingernails refers to the presence of tiny raised lines or ridges that run up and down the length of the nail. Ridges are among the different kinds of nail abnormalities that can develop due to aging, nail injury, or underlying medical conditions.Many people notice an increase in vertical ridges of the fingernails as they age, and this can be a normal development. Aging has been described as the predominant cause of vertical ridges on the fingernails.Onychorrhexis is the medical term used to describe longitudinal ridges on the nails that often accompany brittle nails.
No, adding salt to bread does not cause a question mark...
Made ocean ridges & mountains
earths crust causes it
No. Divergent boundaries cause mid ocean ridges (MORs) to form.