user237650
  • Member for 5 years
  • Last seen more than a week ago
3 answers
118 votes
117k views
41 bookmarks
Why is thymine rather than uracil used in DNA?
3 answers
110 votes
25k views
22 bookmarks
Are male and female brains physically different from birth?
9 answers
108 votes
21k views
40 bookmarks
Why do plants have green leaves and not red?
3 answers
99 votes
17k views
19 bookmarks
What's the evidence against SARS-CoV-2 being engineered by humans?
4 answers
92 votes
7k views
28 bookmarks
Why did the process of sleep evolve in many animals? What is its evolutionary advantage?
4 answers
84 votes
128k views
23 bookmarks
Death because of distilled water consumption
2 answers
64 votes
8k views
19 bookmarks
Why does it hurt the next day after doing significant exercise?
2 answers
50 votes
9k views
12 bookmarks
Why does cutting onions cause tears?​
4 answers
44 votes
10k views
7 bookmarks
Why are bruises not lethal?
6 answers
44 votes
12k views
6 bookmarks
How do scientists kill the bacteria they themselves made resistant?
5 answers
41 votes
8k views
13 bookmarks
Why Is Most Life Symmetrical Externally But Not Internally?
5 answers
39 votes
10k views
9 bookmarks
How does a baby deer stand the day it's born?
2 answers
39 votes
11k views
12 bookmarks
Why do some vegetables taste bitter?
1 answers
39 votes
8k views
14 bookmarks
Does it make sense to classify all humans in a single species?
2 answers
36 votes
13k views
7 bookmarks
How many mosquitoes would it take to "drain" enough blood to put a person into shock?
2 answers
34 votes
3k views
6 bookmarks
Can any animals photosynthesize?
4 answers
34 votes
4k views
11 bookmarks
How and where, in the human brain, are memories stored?
3 answers
34 votes
58k views
17 bookmarks
Why is ATP the preferred choice for energy carriers?
1 answers
33 votes
4k views
15 bookmarks
I just had my genome sequenced. Can someone tell me what these different file formats are?
2 answers
31 votes
9k views
6 bookmarks
Why do tattoos persist if body cells are regularly renewed?
3 answers
29 votes
290k views
5 bookmarks
Why can white hairs get dark again?
3 answers
29 votes
8k views
7 bookmarks
Does animal blood, esp. human, really have similar salinity as ocean water, and does that prove anything about evolution?
2 answers
29 votes
22k views
1 bookmarks
What causes fingerprints to form and why is the pattern formed unique?
3 answers
29 votes
32k views
17 bookmarks
Why is saltatory conduction in myelinated axons faster than continuous conduction in unmyelinated axons?
5 answers
28 votes
9k views
10 bookmarks
What are the advantages of forgetting?
4 answers
28 votes
4k views
5 bookmarks
What does vaccine efficacy mean?
4 answers
25 votes
160k views
7 bookmarks
What is a coupled reaction and why do cells couple reactions?
1 answers
25 votes
10k views
3 bookmarks
Why do stars disappear when I look at them?
2 answers
25 votes
5k views
7 bookmarks
Does sleeping fewer hours than needed cause common cold?
1 answers
25 votes
28k views
9 bookmarks
Why does hair grow after trimming but remains at a constant length after a while?
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