Not quite a "Unix" shell, but the [Ammonite Scala Shell](http://ammonite.io/#Ammonite-Shell) lets you do this trivially:

    lihaoyi Ammonite$ amm
    @ import ammonite.ops._
    import ammonite.ops._
    @ ls! pwd
    res1: LsSeq =
    ".git"              'LICENSE            'ci                 'project            'sshd
    ".gitignore"        'amm                'integration        'readme             'target
    ".idea"             "appveyor.yml"      "internals-docs"    "readme.md"         'terminal
    ".travis.yml"       "build.sbt"         'ops                'shell
    
    @ ls! pwd | (_.mtime)
    res2: Seq[java.nio.file.attribute.FileTime] = List(
      2017-06-21T12:24:41Z,
      2017-06-11T13:48:45Z,
      2017-06-21T12:29:05Z,
      2017-06-11T13:48:45Z,
      2017-05-01T03:41:14Z,
      2017-06-18T14:06:33Z,
      2017-06-11T13:48:45Z,
      2017-06-18T08:01:20Z,
      2017-06-18T12:34:00Z,
      2017-06-19T06:05:51Z,
      2017-06-18T09:06:07Z,
      2017-06-18T14:06:33Z,
      2017-06-18T14:06:15Z,
      2017-06-18T14:07:20Z,
      2017-06-11T13:48:45Z,
      2017-06-18T14:06:33Z,
      2017-06-18T14:06:33Z,
      2017-06-19T06:06:03Z,
      2017-06-18T14:06:33Z
    )
    @ ls! pwd | (_.mtime) sorted
    res3: Seq[java.nio.file.attribute.FileTime] = List(
      2017-05-01T03:41:14Z,
      2017-06-11T13:48:45Z,
      2017-06-11T13:48:45Z,
      2017-06-11T13:48:45Z,
      2017-06-11T13:48:45Z,
      2017-06-18T08:01:20Z,
      2017-06-18T09:06:07Z,
      2017-06-18T12:34:00Z,
      2017-06-18T14:06:15Z,
      2017-06-18T14:06:33Z,
      2017-06-18T14:06:33Z,
      2017-06-18T14:06:33Z,
      2017-06-18T14:06:33Z,
      2017-06-18T14:06:33Z,
      2017-06-18T14:07:20Z,
      2017-06-19T06:05:51Z,
      2017-06-19T06:06:03Z,
      2017-06-21T12:24:41Z,
      2017-06-21T12:29:05Z
    )
    @ ls! pwd | (_.mtime) min
    res4: java.nio.file.attribute.FileTime = 2017-05-01T03:41:14Z
    @ ls! pwd | (_.mtime) max
    res5: java.nio.file.attribute.FileTime = 2017-06-21T12:29:05Z

    @ ls! pwd maxBy (_.mtime)
    res6: Path = root/'Users/'lihaoyi/'Dropbox/'Github/'Ammonite/".idea"

Ammonite certainly has problems around JVM memory usage and startup times, but it has a sweet spot for this sort of not-quite-trivial filesystem operations that are a pain to do in Bash but too small to be worth futzing with a Python script