• Due to an editing error, our article about snake venom (30 September, p 51) stated that it is possible to receive a deadly bite from garter snakes, American racers and radiated rat snakes, all of which are kept as pets. This is not true. Even if you put your hand into those snakes’ mouths, you would not get a deadly bite.
• In the feature “Never say always” (23 September, p 30) we mistakenly obeyed the “i before e” rule and misspelled the name of philosopher Charles Peirce.
