Something Good and Something Unthinkable

First, something good: there is a possibility of a preventive measure which can stop leukemia and some other things.

https://www.theguardian.com/science/2018/dec/30/children-leukaemia-mel-greaves-microbes-protection-against-disease

Second, the unthinkable: there is a possibility cacao (for chocolate) will go extinct by about 2050.

https://www.foodandwine.com/news/scientists-expect-chocolate-extinction

Merry Christmas and Happy New Year !