Cheat sheet
Some generally useful information you may want to look up occasionally.
Geological time scale, eons, eras, periods and epochs
Geological time scale and
Types of hominins
Timeline and grouping of principal fossil hominid species
Biological species classification
The periodic table of the elements
Periodic table of the elements
Particles of the standard model
Standard Model particle zoo
Hominoid clades
Hominoid families with dates.
Phylogenetic tree
![Phylogenetic tree By MPF [Public domain], via Wikimedia Commons](http://natural-universe.net/wp-content/uploads/2015/07/800px-PhylogeneticTree.png)
Phylogenetic tree By MPF [Public domain], via Wikimedia Commons
