44 reactions · 3 comments | The 2018 asteroid impact over Botswana is only the 2nd asteroid detected in space prior to impacting over land. Learn more in this #STIdoc: https://go.nasa.gov/2Wc2BxR Then learn more about NASA - National Aeronautics and Space Administration's planetary defense efforts https://go.nasa.gov/3k3RyyQ & follow NASA Meteor Watch for the latest! #FollowFriday | NASA Scientific and Technical Information (STI) Program | Facebook