About one in 500 males has two tusks, which occurs when the right canine also grows out through the lip. Source: Internet
African elephants have 21 pairs of ribs, while Asian elephants have 19 or 20 pairs. citation An elephant's skull is resilient enough to withstand the forces generated by the leverage of the tusks and head-to-head collisions. Source: Internet
A horse can have between zero and four canine teeth, also known as tusks (tushes for the deciduous precursor), with a clear prevalence towards male horses ( stallions and geldings ) who normally have a full set of four. Source: Internet
Alternative sources Trade in the ivory from the tusks of dead mammoths has occurred for 300 years and continues to be legal. Source: Internet
At up to convert and a typical adult mass range of convert, a walrus can be more than twice the bear's weight, and has up to convert-long ivory tusks that can be used as formidable weapons. Source: Internet
Botswana has recently announced a decision to recommence elephant trophy hunting, and export quotas for the tusks of 400 elephants have been issued for this year. Source: Internet