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
flagthe Netherlands
8%
0%
64%
26%
34
flagAustralia
5%
5%
64%
17%
17
flagSweden
7%
0%
64%
28%
14
flagItaly
11%
0%
61%
27%
18
flagCzech Republic
0%
15%
61%
23%
13
flagthe United States
8%
7%
59%
22%
419
flagNorway
3%
7%
59%
25%
27
flagPoland
10%
5%
56%
27%
10521
flagSpain
0%
12%
56%
31%
16
flagRepublic of Ireland
10%
3%
55%
27%
29
flagthe United Kingdom
10%
4%
54%
29%
228
flagFrance
9%
4%
54%
31%
22
flagCanada
3%
6%
53%
36%
30
flagGermany
10%
2%
50%
35%
122
flagIndia
10%
15%
50%
23%
104
flagUkraine
7%
0%
50%
42%
14
flagUnknown
25%
2%
45%
27%
40
flagPakistan
33%
16%
41%
8%
12
flagthe Philippines
26%
13%
40%
13%
15
flagSwitzerland
0%
27%
36%
36%
11

Gender

men55%
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
29%
32%

Details

Author: Betty
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