User Steve Matthews

22 votes

How to safely derail a train during transit?

answered Mar 27, 2019 at 11:37

3 votes

Avoiding preventing your own birth in a time travel paradox?

answered Sep 27, 2016 at 12:46

2 votes

Rain powered transport

answered Nov 23, 2018 at 15:25

2 votes

How do I keep the government from detecting my flying car?

answered Nov 29, 2018 at 12:38

2 votes

Could solar power be utilized and substitute coal in the 19th century?

answered Mar 26, 2019 at 11:43

2 votes

Animal Tattoos - How would that be possible?

answered Sep 3, 2019 at 13:00

1 vote

Plausible explanations as to why an advanced sci-fi species can't reproduce?

answered Jan 21, 2020 at 12:31

1 vote

Alternatives to War

answered May 23, 2019 at 9:59

1 vote

Victorian long-distance express transport?

answered Mar 26, 2019 at 11:54

0 votes

How to make money from a browser who sees 5 seconds into the future of any web page?

answered Mar 26, 2019 at 16:55

0 votes

Benefits of or reasons why a species would have only one eye?

answered Oct 7, 2016 at 11:14

0 votes

What is holding the cephalopods back

answered Apr 9, 2019 at 13:41

-2 votes

How to prevent guns from working?

answered May 12, 2021 at 15:18

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13 Answers

How to safely derail a train during transit?

Avoiding preventing your own birth in a time travel paradox?

Rain powered transport

How do I keep the government from detecting my flying car?

Could solar power be utilized and substitute coal in the 19th century?

Animal Tattoos - How would that be possible?

Plausible explanations as to why an advanced sci-fi species can't reproduce?

Alternatives to War

Victorian long-distance express transport?

How to make money from a browser who sees 5 seconds into the future of any web page?

Benefits of or reasons why a species would have only one eye?

What is holding the cephalopods back

How to prevent guns from working?