What is the densest substance in the universe?

osmium

diamond

core of the Sun

neutron star

A neutron star is a stellar remnant of a supernova. Neutron stars are very small, but extremely dense - with a radius of only about 12–13 km (7 mi), they can have a mass of about two Suns.

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crabchick wikipedia → Neutron star

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Answers by country

the Netherlands

13%

76%

Australia

13%

10%

66%

177

Greece

11%

65%

Canada

15%

63%

111

the United Kingdom

14%

11%

10%

61%

524

Austria

10%

15%

12%

59%

164

Unknown

18%

59%

Germany

13%

17%

12%

56%

1184

Poland

16%

12%

13%

55%

17248

the United States

16%

13%

14%

54%

1307

Switzerland

13%

17%

14%

52%

South Africa

20%

15%

50%

Malaysia

21%

15%

13%

47%

Singapore

18%

10%

22%

46%

India

22%

18%

14%

42%

1744

Ghana

18%

12%

24%

42%

the United Arab Emirates

22%

41%

Pakistan

15%

24%

19%

39%

171

the Philippines

20%

13%

25%

39%

160

Nigeria

26%

41%

22%

134

How do baby birds get oxygen inside their eggs?

They have a large oxygen supply from the start

Oxygen is created during protein reduction

Oxygen comes in through pores in the shell

They don't need oxygen at all

When is the Eiffel Tower the highest?

Does the candle burn more or less violently in zero gravity?

What is the largest and most powerful bird of prey found in the Americas?