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%

77%

Australia

13%

10%

66%

177

Greece

11%

64%

Canada

15%

63%

111

the United Kingdom

14%

11%

10%

61%

524

Austria

11%

15%

12%

60%

163

Unknown

18%

59%

Germany

12%

17%

12%

56%

1151

Poland

16%

12%

13%

55%

17179

the United States

16%

13%

14%

54%

1298

South Africa

17%

15%

51%

Switzerland

14%

18%

15%

50%

Malaysia

21%

15%

13%

47%

Singapore

18%

10%

22%

46%

India

22%

18%

14%

42%

1743

Ghana

18%

12%

24%

42%

the United Arab Emirates

22%

41%

Pakistan

15%

24%

19%

39%

171

the Philippines

19%

13%

25%

39%

159

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?