Struggled with 'I am not a robot' captchas lately? It's not just you... they're getting harder - here's why

Daily Mail - Science & tech 

Captchas are becoming more difficult to solve and there's a reason why - bots are outsmarting you. The'I'm not a robot' prompt originally made the users copy a series of letters and numbers or identify all the buses in a series of images that were often difficult to get wrong. But new versions that ask users to select the objects that are the same shape or click on the non-aquatic animal. Captchas are puzzles that are used to safeguard websites from nefarious bots, and used to pose a simple'copy the text' question but have now evolved to ask people to solve brain-teasing questions. Captcha puzzles (pictured) can include anything from matching a puzzle piece to the opened slot to copying a series of numbers and letters.