Dangerous Hailstones (04:53)

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An unusual temperature shift strands beach-goers in Siberia. Hail begins as water droplets, usually freezing and falling to earth in pea-sized droplets.

Arctic Ground Squirrel (05:52)

Animals survive freezing temperatures through hibernation. Blood remains in its liquid state through supercooling.

Naked Mole Rat Longevity (03:20)

Scientists study the extended lifespans of cancer-resistant rodents. Studying animal evolution benefits human health.

Encoding Music on DNA (05:19)

Sriram Kosuri has converted OkGo's album to a DNA sequence. Consider how data is translated and stored.

Auto-Brewery Syndrome (07:01)

Separate patients appeared drunk without drinking. This rare condition converts carbohydrates to alcohol during digestion.

Orca Hunting Strategy (04:41)

A Great white shark is killed by an orca whale through tonic immobility. Consider hunting behavior for alpha dolphins and fish.

Limpet Teeth (03:29)

The strongest biological material on earth is created by limpets. A radula contains one-thousand teeth designed to harvest algae.

Displaced African Penguins (03:20)

Searching for burrows to breed and nest in, penguins are disturbing human habitats in southern Africa. Consider how overpopulation disrupts an ecosystem.

Blue Volcano (05:44)

Blue lava at Kawah Ijen is caused by high concentrations of sulfur. When burned, chemical compounds produce various colors.

Glowing Beetle Larvae (04:36)

Newly discovered Amazonian beetle larvae lure prey with light. Making a new discovery is thrilling for scientists.

Credits: Weird Wonders of the World (Series 2): Episode 3 (00:37)

Credits: Weird Wonders of the World (Series 2): Episode 3