Why did Thor's mother not heal herself?
Or is there no technology in Asgard to bring her back?
https://qph.fs.quoracdn.net/main-qimg-245242cfd2d7421a661615c8b7a19f6c
https://qph.fs.quoracdn.net/main-qimg-f003d899858353d7cfc22ad8169dd2b1