Asked by Roderigo, Spain
Tough question to answer...may I say...and not because there is nothing to say, but just because there are so many topics to cover.
Well, to summarize and make it light, science achievements are still there)))
To be more precise, I am going to mention most recent several ones:
Russian winners of Nobel Prize (after 1990):
1990 Peace: Mr.Mikhael Gorbachev
2000 Physics: Mr.Zhores Alferov
2003 Physics : Mr.Alexei Abrikosov & Mr.Vitaly Ginzburg
The Fields Medal is a prize awarded to 2, 3, or 4 mathematicians not over 40 years of age at each International congress - a meeting that takes place every four years. The Fields Medal is often viewed as the top honor a mathematician can receive. More on this medal you can see on Wikipedia: http://en.wikipedia.org/wiki/Fields_Medal
Russian winners of Fields Medal
1994 Mr.Efim Zelmanov
1998 Mr.Maxim Kontsevich
2002 Mr.Vladimir Voevodsky
2006 Mr.Grigori Perelman.*
* This funny guy has declined the medal even though he was awarded "for his contributions to geomerty and his revolutionary insights into the analytical and geometric structure of the Ricci flow"
Russian winner of Abel prize:
2009 Geometry: Mr.Michail Gromov
I am not aware of any prizes for space science development but the fact that Russians are not doing that bad in this science can be proved by the blog of one of the members of the International Space Station.
Too bad Russian cosmonaut Maxim Suraev updates his Russian version of the blog from the Space Station http://www.roscosmos.ru/DocDoSele.asp?DocID=528&ShowAdm= more often that the English one http://rt.com/About_Us/Blogs/orbital-log/2009-10-15.html
I hope my brief review gave you some ideas, Roderigo. Watch for the updates, though ))))