Science Stamp Thematic on WOPA+
Science
| 50th Anniv. of Yuri Gagarin’s Flight to Space |
| Issued: 18.04.2011 |
| ›Armenia |
| First Man Travelled in Space 50 Years Ago |
| Issued: 14.04.2011 |
| ›Hungary |
| World Meteorological Day |
| Issued: 23.03.2011 |
| ›Bosnia and Herzegovina - Mostar |
| World Expo, Shanghai Gömböc |
| Issued: 23.06.2010 |
| ›Hungary |
| Europa - Astronomy |
| Issued: 01.07.2009 |
| ›Armenia |
| Europa - Astronomy |
| Issued: 04.05.2009 |
| ›Bosnia and Herzegovina - Mostar |
| Europa - Astronomy |
| Issued: 23.04.2009 |
| ›Bosnia and Herzegovina - Republic of Srpska |
| Europa - Astronomy |
| Issued: 16.04.2009 |
| ›Montenegro |
| Minerals Gold Ore |
| Issued: 15.09.2007 |
| ›Ghana |
| 50th Ann Pauls Stradins Museum of the History of Medicine |
| Issued: 09.03.2007 |
| ›Latvia |
| Earth Day |
| Issued: 22.04.2006 |
| ›Bosnia and Herzegovina - Mostar |
| Millennium - The XXth Century (II) |
| Issued: 28.08.2000 |
| ›Romania |
| Millennium - The XXth Century (I) |
| Issued: 24.07.2000 |
| ›Romania |
| Total Solar Eclipse |
| Issued: 21.06.1999 |
| ›Romania |
| 125th Ann of Red Cross 1989 |
| Issued: 07.07.1989 |
| ›Gibraltar |
| 1985 STOP Polio Campaign (catalogue price) |
| Issued: 03.05.1985 |
| ›Gibraltar |
| 1973 125th Anniv. of Gibraltar Skull |
| Issued: 22.05.1973 |
| ›Gibraltar |