By Raul Cortes | Monterrey, Mexico.

By Rupesh Sangoi | Mumbai, India

By Aurelian Neacsu | Visina, Dambovita, Romania

By Rob Williamson | Columbus, TX

By Emily Crowell | Pogue Creek Canyon State Natural Area, Jamestown, TN, USA

By Xiaoyun Lai | Gastonia, North Carolina, USA

By Nina Gorenstein | West Lafayette, IN, USA

By Lorraine Boyd | Delmar, NY USA

By Robert Santa Ana | Glen Ellyn, IL, DuPage

By Victor C. Rogus | Sedona, Arizona

By Kevin Saragozza | Siracusa Plemmirio

By Jim Peacock | Red Cliff, Wisconsin

By Helio C Vital | Itatiaia, Rio de Janeiro, Brazil

By Bonnie Nickel | San Diego, California,USA

By Kannan A | Woodlands, Singapore

By Cristina Dachnowska | Točnik, Czech Republic