Humans don't have natural ability to regenerate teeth, but sharks do.

Not sure why we don't have this ability naturally but sharks could help us develop the technology:

• Study identifies network of genes that help sharks grow new teeth throughout their lifetime
• Humans possess same cells but tooth regeneration ability is limited
• Research paves the way for development of therapies for human tooth loss

"Humans don't have natural ability to regenerate teeth..."

Ahem, I beg to differ.

How are you regenerating teeth?