Jack Dykinga / Aurora Borealis with conifers of the taiga below. Polar Lake, nea Great Slave Lake, Northwest Territories, Canada. September 2018.

Jack Dykinga / Aurora Borealis reflected in lake. Northwest Territories, Canada. September 2018.

Georgette Douwma / Juvenile of a Whitespotted puffer (Arothron hispidus) Puerto Galera, Philippines.

Gavin Hellier / Timelapse from day to night of American flags flying around the Washington Monument, Washington DC, USAJune 2016. Hellier

Linda Pitkin / Whitespotted puffer (Arothron hispidus) on coral reef, Jackfish Alley, Ras Mohammed NP, Egypt, Red Sea.

Linda Pitkin / Whitespotted puffer (Arothron hispidus) on coral reef, Shark Reef to Jolande, Ras Mohammed National Park, Egypt, Red Sea.

Linda Pitkin / Whitespotted puffer (Arothron hispidus) on coral reef, Shark Reef to Jolande, Ras Mohammed National Park, Egypt, Red Sea.

Nature Production / White-spotted pufferfish (Torquigener albomaculosus) Kagoshima, Japan

Tony Wu / White-spotted pufferfish (Arothron hispidus) being cleaned by Bicolor cleaner wrasse (Labroides bicolor) Ambitle Island, one of the two islands in the Feni Island group, New Ireland, Papua New Guinea.

Ernie Janes / Stars and stripes national flag of the United States of America blowing in the wind.

Kirkendall-Spring / American stars and stripes flag on top of Chimney Rock in Chimney Rock State Park. North Carolina, USA, October 2013.

Kirkendall-Spring / American Stars and stripes flag on top of Chimney Rock in Chimney Rock State Park. North Carolina, USA, October 2013.

Pete Cairns / Stars and Stripes USA national flag blowing in wind against blue sky

Gavin Hellier / Stars and stripes American flag, California, USA

Rick Tomlinson / Stars and Stripes race against Team New Zealand prior to the America's Cup, 1992.

Franco Banfi / White spotted pufferfish (Arothron hispidus) pair, male biting and holding onto female prior to mating, Espiritu Santo Island, Baja California, Mexico, Sea of Cortez.

Franco Banfi / White spotted pufferfish (Arothron hispidus) pair, male biting and holding onto female prior to mating, Espiritu Santo Island, Baja California, Mexico, Sea of Cortez.

Franco Banfi / White spotted pufferfish (Arothron hispidus) pair, male biting and holding onto female prior to mating, Espiritu Santo Island, Baja California, Mexico, Sea of Cortez.

Franco Banfi / White spotted pufferfish (Arothron hispidus) pair, male biting and holding onto female prior to mating, Espiritu Santo Island, Baja California, Mexico, Sea of Cortez.

Claudio Contreras / White-spotted pufferfish (Arothron hispidus) close up. Huatulco Bays National Park, Oaxaca state, Mexico, Pacific Ocean. November.

Joel Sartore / Photo Ark / Two Gray sand stars, showing varying color morphs. (Luidia lawrencei) the larger, solid colored starfish on the left and (Luidia clatherata) the smaller starfish with lines, on white background, Gulf...

Joel Sartore / Photo Ark / Two Gray sand stars, showing varying color morphs. (Luidia lawrencei) the larger, solid colored starfish on the left and (Luidia clatherata) the smaller starfish with lines, on black background, Gulf...

Lewis Jefferies / White-spotted puffer fish (Arothron hispidus) resting on seabed, Marsa Alam, Red Sea, Egypt.

David Fleetham / USS Arizona memorial at Pearl Harbor, a graveyard for the men lost aboard the ship when it sank during the Pearl Harbor attack, Oahu, Hawaii, Pacific Ocean.

Georgette Douwma / Mixed Pufferfish, adults and juveniles, composite image on black background, 1. Star puffer (Arothron stellatus); 2. Black spotted porcupinefish (Arothron hystrix); 3. Star puffer (Arothron stellatu...

Georgette Douwma / Mixed Pufferfish, adult and juvenile, composite image on black background, 1. Black spotted porcupinefish (Arothron hystrix); 2. Blackspotted puffer (Arothron nigropunctatus); 3, 4. Star puffer (Aroth...