why do giraffes have lumps on their head?

[spk]

The two lumpy horn things?? Any takers?

[Kingaroo]

Don't you have access to Google?

Both male and female giraffes have two distinct, hair-covered horns called ossicones. Male giraffes use their horns to playfully fight with one another. As male giraffes age, calcium deposits form on their skulls and other horn-like bumps develop. Giraffes can have up to three of these large bumps, two in the rear of the skull and one in the forehead region, so that it may look like they have five horns.

[Chillum]

They're the only animal which is born with horns already formed. Just aswell their hair covered.

[snapdarlich]

Kingaroo, If everyone went on to Google, noone would be here.

It's a friendly world.

...and I'm glad you helped.