By David Gray | Perth, Western Australia

By Prateek Pandey | Bhopal, Madhya Pradesh, India

By Simon Capone | Morangup, Western Australia

By James Gaulding | Las Cruces, New Mexico, U.S.A.

By Saranya J | Maryland, USA

By Prateek Pandey | Bhopal, Madhya Pradesh, India

By Soumyadeep Mukherjee | Kolkata, West Bengal, India

By Ayushi Kesarwani | Baddi, Himachal Pradesh

By Kevan Hubbard | Teesmouth nature reserve, Co Durham, England

By Helio C. Vital | Rio de Janeiro, Brazil

By Nicholas Holshouser | Blue Ridge Parkway Milepost 410, North Carolina, USA

By Chix RC | Gardena, CA

By Prateek Pandey | Bhopal, Madhya Pradesh, India

By Rob Pettengill | Austin, Texas, US

By Raul Cortes | Monterrey, Mexico.

By Steve McLaughlin | Kelvin-Helmholtz clouds, Pacific Ocean off Gualala, California