What? Rinri Therapeutics wants to cure deafness.

What, exactly? Most cases of deafness involve the loss of specific types of cells and nerve endings. Unlike other cells in our body, though, these do not regenerate. In other words, deafness can be at best mitigated with mechanical apparatus or implants, but it cannot be cured. Rinri Therapeutics is developing a stem-cell-based approach to regenerate the damaged nerves.