Babirusas are also sometimes called "prehistoric pigs" because they appear in cave drawings from nearly 40,000 years ago. Scientists don't know exactly why male babirusas have these tusks.

They can be told apart from pigs by the shape of their tusks. Pig tusks are long and curve around themselves, while javelina ...

Dark-skinned pigs are more likely than pale ones to survive in the wild and pass along their genes. Wild hogs develop curved “tusks” as long as seven inches that are actually teeth (which are ...

ON THE downside, America's 6m or so feral pigs are dangerous pests armed with sharp tusks, short tempers and large appetites. A single herd, or "sounder", can wreck a corn crop or leave a meadow ...