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The Magnificent Blue Whales
The blue whale, discovered in 1758 by Carl Linnaeus, is Earth's largest known animal. These magnificent creatures can reach lengths of 30 meters and weigh up to 200 tons, making them heavier than 33 elephants combined. A blue whale's heart alone weighs 450 kilograms and can pump 220 liters of blood with each beat. Their distinctive calls can reach 188 decibels and travel through the ocean for up to 1,000 kilometers. These gentle giants feed almost exclusively on tiny krill, consuming up to 6 tons of these small crustaceans daily during their peak feeding season.
1. Who discovered the blue whale?
The passage states that the blue whale was discovered in 1758 by Carl Linnaeus.
2. What is a blue whale's maximum length?
According to the text, blue whales can reach lengths of 30 meters.
3. How much does its heart weigh?
The passage mentions that a blue whale's heart weighs 450 kilograms.
4. How loud are their calls?
Their distinctive calls can reach 188 decibels.
5. How much krill do they eat daily?
Blue whales consume up to 6 tons of krill daily during peak feeding season.