Summary:
- The Curiosity rover on Mars has discovered a mysterious network of ridges in Gale Crater, which is an ancient impact crater on the Martian surface.
- These ridges form a lattice-like pattern and are made of a mineral called silica, which suggests they were formed by the flow of water in the past.
- The presence of these ridges provides further evidence that Mars once had a wetter climate and may have been more hospitable to life in the ancient past.