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

13%

76%

France

15%

12%

69%

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66%

177

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11%

65%

Canada

15%

63%

111

the United Kingdom

14%

11%

10%

61%

526

Austria

10%

15%

12%

60%

168

Unknown

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59%

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16%

12%

13%

55%

17368

Germany

13%

17%

12%

55%

1204

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13%

14%

54%

1313

Switzerland

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17%

14%

53%

South Africa

20%

15%

50%

Malaysia

21%

15%

13%

47%

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18%

10%

22%

46%

India

22%

18%

14%

42%

1747

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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?