 NASA is canceling a planned mission to the moon. The so-called Viper moon rover was supposed to land near the south pole of the moon looking for ice, but the project has been plagued by cost overruns. Instagram now says it will allow some researchers to look at its data to learn more about how the social network may be affecting the mental health of teenagers. The data could include how much time teens spend on the app and how many accounts they follow, but it will not include the content of any posts, direct messages, or any comments.