Click here to view a larger image. Anencephaly is a serious birth defect in which a baby is born without parts of the brain and skull. It is a type of neural tube defect (NTD). These are birth defects that happen during the first month of pregnancy, usually before a woman knows she is pregnant.nencephaly happens if the upper part of the neural tube does not close all the way. This often results in a baby being born without the front part of the brain (forebrain) and the thinking and coordinating part of the brain (cerebrum). The remaining parts of the brain are often not covered by bone or skin.
, Have been selling pepper spray since 2001. 1  Bear spray smells like the hot pepper product it is made from and the tri-chloroethylene used in its manufacture. 2  Bear spray serves to repel bears if they are attacking you. 3  By the way, you cannot use bear spray as a repellent like you would DEET for mosquitos.
Detecting Other Polar Bears. Their amazing sense of smell isn't merely used for finding their way to prey. It's also used for locating other polar bears in the area. A mama bear's sense of smell helps her to keep close contact with her cubs.