A flying rock, call a geologist!: falling_snowflake_by_uncreativescreenname-d4jgu7k
A flying rock, call a geologist!: first_snow__by_the_stream_by_uncreativescreenname-d4eenvw
A flying rock, call a geologist!: Carboniferous Forest Floor
A flying rock, call a geologist!: North Korea's Ballistic Missile Tests