- Gold
- Alzheimer
- Heart
- Mallorca
- Insects
- Cooperation
- Heart
- Cell
- Solidarity
- Onion
- Flu
- Concrete
- Cancer
- Longevity
- Turtle
- Bears
- Warm-up
- Mersenne
- Cycling
- Attention
- Diet
- HIV
- Heart
- Tinnitus
- Forest
- Diabetes
- Ozone
- Alzheimer
- Carbon
- Travel
- Diabetes

2018

January

Public Domain by Kelson
| There are infinitely many prime numbers, however, it
is not easy to find very big ones and establish that they are
prime. One class of prime numbers are Mersenne prime numbers, they
have the form 2 |