What is deltiology?

Hobby of collecting postcards
Science of quantum equations
Science of wines
Field of medicine, about intestines
Officially the biggest collection postcards has got Mario Morby from Great Britain. Contains 1 000 265 pieces. It is officially record in Guinness Book of Records.
lukasz Poland
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Very interesting!
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Answers by country

Hobby of collecting postcards
Science of quantum equations
Science of wines
Field of medicine, about intestines
answers
flagPakistan
92%
7%
0%
0%
13
flagAustria
75%
8%
16%
0%
24
flagGreece
61%
30%
0%
7%
13
flagAustralia
57%
35%
0%
7%
14
flagGermany
49%
21%
8%
18%
69
flagthe United States
39%
20%
11%
27%
43
flagIndia
36%
24%
16%
24%
25
flagPoland
29%
18%
23%
28%
1740
flagthe United Kingdom
29%
23%
29%
17%
34