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Dennissew

02 Apr 2025 - 01:13 pm

Narwhals may be using their tusks to play, new study finds
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Scientists say they have the first recorded video evidence of narwhals using tusks not only to strike and manipulate fish during feeding but also engage in what appears to be playful behavior, according to the latest research.

The narwhal, often referred to as the “unicorn of the sea” in a nod to its trademark tusk, has long remained an enigma. Scientists have observed few interactions of narwhals in their natural habitat, creating speculation about the purpose of the species’ distinctive spiraling tusk.
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Found predominantly in males, the tusk grows up to 10 feet (3 meters) long — and previous research has suggested it serves as a competitive display to secure mates. But now, with the help of drones, research conducted in the Canadian High Arctic has uncovered that a narwhal may use its tusk for more than just courtship.

In total, the researchers newly identified and described 17 distinct behaviors of narwhals involving prey. The findings revealed a wide range of interactions and dynamics between narwhals and fish as well as the extraordinary agility, precision and speed of their tusks to track moving targets, according to the study published February 27 in the journal Frontiers in Marine Science.

“Seeing that these animals are not actually hunting the fish but exploring, manipulating and interacting with it was really a game changer,” said lead author Dr. Gregory O’Corry-Crowe, a research professor in the Harbor Branch Oceanographic Institute at Florida Atlantic University.

Since so little is understood about this whale species, researchers like O’Corry-Crowe and his colleagues are working diligently to conduct studies to document narwhals’ unknown behaviors to better understand how these animals adapt in a rapidly shifting habitat as oceans warm and sea ice melts.
Narwhal exploratory behavior
The study team captured the groundbreaking footage using drones in Creswell Bay, on the eastern side of Somerset Island in Canada’s Nunavut territory, during the summer of 2022.

As the researchers analyzed the footage, they noticed subtle nuances in the narwhals’ behavior. Footage even captured one instance of a narwhal interacting with a fish by repeatedly nudging it with its tusk — which is actually a giant tooth — without attempting to eat it.

When researchers observed a lack of aggression in some interactions between narwhals and fish, they realized these scenarios were more similar to a cat-and-mouse game, in which the animals were chasing or “playing” rather than hunting, O’Corry-Crowe said.

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02 Apr 2025 - 12:26 pm

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02 Apr 2025 - 10:07 am

SpaceX’s Starship spacecraft explodes midflight for a second time, disrupting Florida air traffic
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A SpaceX Starship spacecraft, the upper portion of the most powerful launch system ever built, exploded during its eighth test flight Thursday, disrupting air traffic and marking the second consecutive failure for the vehicle this year.

The uncrewed Starship mission lifted off at 5:30 p.m. CT (6:30 p.m. ET) from SpaceX’s Starbase facility in South Texas, with the spacecraft riding atop a 232-foot-tall (71-meter-tall) Super Heavy rocket booster.

After about 2 ? minutes of firing, the Super Heavy booster separated as planned from the Starship’s upper stage, setting itself up for a successful landing within the “chopstick” arms of “Mechazilla,” or SpaceX’s launch tower near Brownsville, Texas. It’s the third time SpaceX has successfully executed the chopsticks booster catch.
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But less than 10 minutes into the flight, the Starship craft, which had continued on toward space, began to experience issues. Several of the vehicle’s engines visibly cut out during the livestream, and the ship began to tumble before SpaceX lost contact with it.

“Once you lose enough of those center engines, you’re going to lose attitude control,” said Dan Huot, SpaceX communications manager, on the livestream. “And so we did see the ship start to go into a spin, and at this point, we have lost contact with the ship.”
The loss of signal occurred at roughly the same point during this mission as with Flight 7 in January, when Starship exploded over populated islands in Turks and Caicos, littering the islands with debris.

It has not been confirmed where exactly the vehicle exploded during Thursday’s mission. But the explosion was visible from parts of Florida and over the Caribbean, according to reports from residents of those locations that were shared with CNN.

The Federal Aviation Administration halted flights into Miami, Fort Lauderdale, Palm Beach, and Orlando airports Thursday evening for “falling space debris” until 8 p.m. ET.

The FAA also temporarily kept flights from departing from Fort Lauderdale/Hollywood International Airport and Miami International Airport. Flights leaving those airports were still delayed on average by 30 and 45 minutes, respectively, as of Thursday night.