> Humans were already pretty handy Having opposable thumbs is a pretty big deal. One Arthur Clarke short story that has always weirdly stuck with me is "Secon

> Humans were already pretty handy Having opposable thumbs is a pretty big deal. One Arthur Clarke short story that has always weirdly stuck with me is "Second Dawn" - which revolves around super-intelligent telepathic horse-like aliens, who have sadly limited technology because they only have hooves.