What is narwhal 'horn' really made of?

it is a horn grown on its forehead
it is an adapted scale
it is a canine tooth
it is an adapted nose bone
Usually, males have a single long tusk, the canine on the left side of the upper jaw that projects through the lip and forms a left­-hand­ed helix. The tusk grows through­out life reaching length of 3 m (10 ft). In some rare cases, both canines grow equally long, forming two tusks. In the Middle Ages, narwhal tusks were sold as unicorn horns.

Answers distribution

it is a horn grown on its forehead
it is an adapted scale
it is a canine tooth
it is an adapted nose bone
answers
flagAustria
7%
0%
69%
23%
13
flagAustralia
5%
5%
66%
16%
18
flagthe Netherlands
8%
0%
65%
25%
35
flagSweden
7%
0%
64%
28%
14
flagCzech Republic
0%
15%
61%
23%
13
flagthe United States
8%
7%
59%
22%
426
flagNorway
3%
7%
59%
25%
27
flagItaly
15%
0%
57%
26%
19
flagPoland
10%
5%
56%
27%
10868
flagUkraine
6%
0%
56%
37%
16
flagSpain
0%
12%
56%
31%
16
flagthe United Kingdom
9%
4%
55%
29%
233
flagFrance
9%
4%
54%
31%
22
flagCanada
3%
6%
53%
36%
30
flagUnknown
22%
1%
51%
24%
54
flagGermany
10%
2%
50%
35%
122
flagSwitzerland
0%
21%
50%
28%
14
flagIndia
11%
15%
49%
22%
105
flagRepublic of Ireland
11%
5%
47%
32%
34
flagthe Philippines
26%
13%
40%
13%
15

Gender

men54%
women52%
it is a horn grown on its forehead
9%
8%
it is an adapted scale
5%
6%
it is a canine tooth
55%
52%
it is an adapted nose bone
30%
32%

Details

Author: Betty
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