OK, gumshoes. I found silica on Mars. Lots of it. The question remains: did water deposit it or just


OK, gumshoes. I found silica on Mars. Lots of it. The question remains: did water deposit it or just
OK, gumshoes. I found silica on Mars. Lots of it. The question remains: did water deposit it or just
OK, gumshoes. I found silica on Mars. Lots of it. The question remains: did water deposit it or just
OK, gumshoes. I found silica on Mars. Lots of it. The question remains: did water deposit it or just