Most popular questions

97 How can a storm drop 40 inches (1 metre) of rain? 2017-08-27T13:50:38.863

86 Impossible or improbable? Hurricane crossing the equator 2014-04-17T00:18:11.430

82 What place on Earth is closest to the Sun? 2019-01-21T15:04:05.833

73 Are there any saltwater rivers on Earth? 2016-10-03T06:52:20.240

61 Why does lightning strike from the ground-up? 2014-04-27T05:59:40.393

54 How many trees would I have to plant to solve Global Warming? 2014-10-16T18:03:57.337

50 What started the US Dust Bowl of the 1930s, and could it happen again? 2014-04-21T23:47:47.947

50 How much oil is created each year? 2014-04-26T05:29:59.460

47 Why is the pond in my backyard not frozen when it is -15 °C (5 °F) outside? 2016-01-10T15:29:57.030

45 Why do snowflakes form into hexagonal structures? 2014-04-23T05:25:03.900

45 How do 'greenhouse gases' let heat in, but not let it out? 2018-07-28T09:47:18.817

43 (How long) would Earth's atmosphere last without a global magnetic field? 2014-04-22T18:09:51.510

43 Are Richter-magnitude 10 earthquakes possible? 2014-05-10T20:40:19.640

40 Farthest point from the center of the Earth 2014-11-12T12:24:57.657

40 Are there any uncharted waters left on earth? 2014-12-06T20:52:07.137

39 How it's possible to measure temperature 2000 years ago with such precision? 2020-08-23T12:34:38.117

38 What would be the temperature of earth if there was no atmosphere? 2014-05-07T03:36:15.547

38 CO₂ level is high enough that it reduces cognitive ability. Isn't that a reason to worry? 2019-11-05T21:31:09.197

37 How is the mass of the Earth determined? 2014-04-16T05:12:33.473

37 Why do the Siberian methane craters have smooth vertical walls? 2014-08-10T20:16:33.240

37 What does a mm of rain mean? 2018-07-11T12:18:08.343

36 Similarities between grand circulation solvers and mantle convection solvers 2014-04-15T21:55:50.173

36 Why is Earth's inner core solid? 2014-04-24T16:03:30.313

36 How do we know the asteroids formed at the same time as earth? 2014-11-19T21:36:03.787

36 Is the sea level rise unusual? 2019-01-27T21:48:13.283

36 Is climate change a vicious circle? 2020-01-14T08:49:42.857

35 Does gravity increase the closer to the core you get? 2020-02-06T05:55:02.093

34 How can we determine the size and composition of Earth's inner core? 2014-04-24T02:10:03.133

34 How would plate tectonics differ if Earth had no water? 2014-05-04T19:02:07.897

34 Why is Earth's age given by dating meteorites rather than its own rocks? 2014-11-18T12:04:32.333

34 How does anthropogenic heating affect global warming? 2014-12-14T06:32:53.253

34 How high must one be for the curvature of the earth to be visible to the eye? 2016-01-18T04:52:58.020

34 Is there any river that does not discharge into larger body of water? 2020-08-04T17:26:38.630

33 How and why did the oceans form on Earth but not on other planets? 2014-04-16T05:55:55.730

33 Why do felsic materials have lower melting points than mafic? 2014-04-16T18:05:38.590

32 Why does Coriolis determine the rotation direction of a cyclone but not my drain? 2014-11-11T15:24:51.107

32 Is it true that earthquakes are not felt in a cave? 2015-07-14T15:15:09.687

31 How much of the current global warming is due to human influence? 2014-04-16T01:11:57.480

31 What factors determine the number of Hadley cells for a planet? 2014-05-23T06:22:07.763

30 What is the status of the Raymo & Ruddiman idea that Tibet cooled the Earth? 2014-04-15T22:36:48.483

30 Why is Earth's outer-core liquid? 2014-04-24T16:42:16.060

30 Is earthquake prediction possible? 2014-05-11T03:14:19.903

30 How would an icicle "grow" upwards? 2015-01-09T01:13:47.087

30 Is it possible for rivers to freeze completely and stop flowing? 2015-02-03T01:47:51.073

30 At what humidity does it start to rain? 2015-06-23T21:25:32.123

30 Where on Earth is the magnetic field intensity stronger? 2018-04-10T20:27:53.710

29 How do weather models work? 2014-04-15T20:15:10.483

29 Can pyroclastic flows cross water? 2014-04-17T15:38:05.980

29 Is this XKCD comic an accurate timeline of the earth's average temperature? 2016-09-15T12:30:34.010

28 What would it take to confirm or refute the Snowball Earth Hypothesis? 2014-04-19T03:25:22.627