Weird Places Australia's Bright Pink Lake

The video explores the unique pink color of Lake Hillier, a small lake on Middle Island, Australia. Unlike typical lake colors, Lake Hillier's pink hue is not an optical illusion and remains even when the water is removed. Scientists believe the color is due to high salinity and the presence of salt-loving microalgae and halobacteria, which produce pigments. These extremophiles are ancient organisms that thrive in harsh conditions. Despite the unusual color, the lake is safe for swimming, making it an intriguing destination.

What is unique about Lake Hillier's water color?

• It appears pink only at sunset.

• It changes color with the seasons.

• It is blue like most lakes.

• It is naturally pink and retains its color when removed.

Which organism is primarily associated with the pink color of Lake Hillier?

• Halobacteria

• Green algae

• Blue-green algae

• Dunaliella salina

What is a common feature between Lake Hillier and Lake Retba?

• Both are located in Australia.

• Both are freshwater lakes.

• Both have a pink color due to similar algae.

• Both are the largest lakes in their regions.

What is unique about halophilic archaea in Lake Hillier?

• They are responsible for the lake's blue color.

• They are visible only under a microscope.

• They can survive in extremely salty conditions.

• They are a type of bacteria.

Why might Lake Hillier be considered a safe swimming destination?

• It is located in a popular tourist area.

• It is a freshwater lake.

• The water is perfectly safe despite its color.

• It has no dangerous wildlife.