The plains zebra is the only species of wild equid not near or on the verge of extinction. Both the Grevy's zebra and the mountain zebra are listed as endangered, along with one other species in the family Equidae. While plains zebra populations remain plentiful, their numbers diminished greatly in the last century. This is for several reasons. Humans hunt them for sport and their skins.
Glyphosate (Roundup) Linked To Cancer of the Lymph Tissue In New Study. A new review on the relationship between pesticide exposure and the risk of blood cancers in the lymph glands (lymphomas) has confirmed the existence of a link with the world's most popular herbicide glyphosate (aka Roundup).
BRCA1 and BRCA2 mutations are the most common cause of hereditary breast cancer. Right now, PALB2 and other breast cancer gene abnormalities appear to be a less common cause of breast cancer, although testing for many of these genes is now also available.