42 How do you simulate the organic growth of a city when designing it? 2014-09-16T19:04:36.573

40 How large can a water bear become before it loses its abilities? 2017-02-02T18:00:52.797

34 Is it possible for nature to create bubble wrap? 2019-12-11T17:12:13.867

15 Human/mammal growth on Mars 2014-09-23T12:49:53.083

12 Can mammals go through metamorphosis? 2015-08-24T23:22:20.307

11 Big, big, big... beans 2015-05-04T14:51:07.297

11 What kinds of plants could grow near crystals and in (mostly) crystal sands? 2017-05-15T12:20:22.577

11 Two countries have a five thousand mile desert between them. How can a city survive there? 2017-12-19T20:02:56.847

8 How does "growing up" in a robotic species work? 2017-07-05T13:16:40.390

7 Natural environment to force evolution to Immortality 2017-06-15T01:44:56.423

6 Would all species on Earth go extinct if 90% of males died? 2016-12-02T13:47:39.523

6 Tall trees : atmospheric pressure 2019-11-10T11:58:36.150

5 What are plausible reasons for aquatic axolotl-like animals to walk on land? 2019-01-22T03:42:05.207

4 Tall trees : selective pressure 2020-01-06T17:48:06.697

3 How many people or how much force is needed to pave a path through a forest? 2016-05-15T20:27:55.167

2 Could a mammal procreate if it existed out of multiple sets of DNA in different cells? If so, how? 2019-06-24T18:07:59.237

1 What might be a plausible explanation for the drastic lowering of global temperatures? 2018-07-11T17:50:34.997

1 How tall would animals, trees and "humans" grow on a planet with those characteristics? 2019-11-05T17:09:55.237

0 Why did nature choose only two types of gender? 2016-10-15T04:18:38.250

-2 How can a species not grow? 2016-11-15T18:37:05.633