Marine Mammals

Orca: The Boat-Ramming Behavior Scientists Can’t Explain

Since 2020, a small population of orcas near Gibraltar has rammed and sunk boats hundreds of times. Real data on the leading theories, plus what matrilineal pods and grief tours reveal.

Narwhal: The Tusk Is a Sensor With 10 Million Nerve Endings

A 2014 study found the narwhal tusk is a porous, nerve-packed sensor, not a weapon or ornament. For centuries it was sold across Europe as a fake unicorn horn.

Sea Lion: The Mammal That Keeps a Beat Better Than You

Ronan the sea lion keeps a beat more precisely than humans do, upending rhythm theory. A toxic-algae crisis makes wild sea lions unpredictably aggressive.

Beluga Whale: The Captive Male Who Learned to Mimic Human Speech

A captive beluga named Noc spontaneously mimicked human speech, confirmed in a 2012 study. Plus an annual skin molt and Norway's disputed 'spy whale.'

Leopard Seal: It Killed One Diver and Tried to Feed Another

The only confirmed human death by leopard seal happened in 2003. Three years later, a different one spent four days trying to feed a National Geographic photographer penguins.

Sperm Whale: The Loudest Animal Has a Four-Part Alphabet

Sperm whale clicks hit 236 decibels underwater. A 2024 study found four combinable features hiding inside them, plus the real science behind the whale that sank a ship.

Walrus: A Crushed Calf Outweighs a Hunted Adult

A 2013 population model found that walrus calves crushed in beach stampedes hurt the species more than an equal number lost to hunting, a new cost of vanishing sea ice.

Dugong vs Manatee: Only One of Them Chews Like an Elephant

A fluked tail tells them apart at a glance, but the real split is dental: manatees replace their teeth on a conveyor belt shared with elephants, dugongs never did.