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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the Netherlands

12%

76%

France

14%

11%

70%

Australia

13%

11%

65%

179

Greece

11%

65%

Canada

15%

63%

111

the United Kingdom

14%

11%

10%

61%

533

Austria

10%

15%

12%

60%

168

Unknown

18%

59%

Poland

16%

12%

13%

55%

17533

the United States

16%

12%

14%

55%

1333

Germany

13%

16%

12%

55%

1232

Switzerland

13%

17%

14%

54%

South Africa

21%

14%

48%

Malaysia

21%

15%

13%

47%

Singapore

18%

10%

22%

46%

the United Arab Emirates

21%

43%

India

22%

18%

14%

42%

1748

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?