Statistical Genetics Wiki
20s ke ngwagasome tšhupamabakeng ya Gregorian wa go thoma ka 1 Pherekgong 20 ya fela ka 31 Manthole 29. Ngwagasome 20s o wela ngwagengkgolo wa 1.
| Ngwagakete: | Ngwagakete 1 |
| Mengwagakgolo: | Ngwagakgolo 1 BC – Ngwagakgolo 1 – Ngwagakgolo 2 |
| Mengwagasome: | 0s BC 0s 10s – 20s – 30s 40s 50s |
| Mengwaga: | 20 21 22 23 24 25 26 27 28 29 |
| 20s-tšago tswalanya: |
