X marks the spot? NASA spots bizarre X-shaped structures in Earth's upper atmosphere - and scientists warn the - Daily Mail
- X marks the spot? NASA spots bizarre X-shaped structures in Earth's upper atmosphere - and scientists warn the Daily Mail
- NASA spots unexpected X-shaped structures in Earth's upper atmosphere — and scientists are struggling to explain them Livescience.com
- NASA Detects Unusual X-Shaped Structures In Earth's Upper Atmosphere NDTV
- Nasa spots 'surprise' X shapes in Earth's atmosphere The Independent
- NASA Detects Strange, Alphabet-Like Shapes in Earth's Ionosphere Popular Mechanics