Orcas hunting great white sharks have been documented in peer-reviewed studies from South Africa and Mexico, though the evidence is regional.
New study discovers how some sharks rest
Introduction Most sharks never stop swimming for their entire lives. Some species have evolutionary traits that allow them to stay in place. However, most sharks require movement to extract oxygen through their gills. For these sharks, stationary resting is impossible. How sharks rest is a large mystery to shark science. Behaviors have been observed, but […]
New study suggests sharks almost went extinct 19 million years ago
Introduction When people think of extinctions that reshape Earth’s history, they typically refer to the extinction of the Dinosaurs 65 million years ago. Massive environmental change usually triggers extinctions, such as an asteroid impact or shift in climate. Recently, researchers believe in discovering a previously unknown extinction event from 19 million years ago. Researchers tell […]
Sharks can navigate using magnetic fields
Great white sharks make an annual journey from South Africa to Australia. The trip is over 12,000 miles. There is no GPS to guide these sharks, nor are there landmarks they can use to set their course. Currents and water temperatures vary. Yet, the sharks chart a straight line across the ocean every year. Scientists […]
