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Why is Icthyostega credited so often as the first land animal? Weren't arthropods and insects there first?
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How fast is gravity?
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'Physics' how fast is gravity?
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Since smoke alarms use an alpha emitter/detector, would it be possible to modify one into a makeshift radiation detector or even geiger counter?
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Why is Icthyostega credited so often as the first land animal? Weren't arthropods and insects there first?
9
--
10
9
8
7
6
5
4
3
2
1
0
How fast is gravity?
1
--
10
9
8
7
6
5
4
3
2
1
0
'Physics' how fast is gravity?
1
--
10
9
8
7
6
5
4
3
2
1
0
Since smoke alarms use an alpha emitter/detector, would it be possible to modify one into a makeshift radiation detector or even geiger counter?
1
--
10
9
8
7
6
5
4
3
2
1
0
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