Curious places in Greenland

Ice cores revealing 25 times during the ice age when Greenland warmed by 8-16°C in just decades. Climate can flip like a light switch.

These sharks live 400+ years but show no aging markers. Their eye lens proteins accumulate carbon-14 from nuclear tests, revealing birth decades with radiocarbon dating.

Ice cores showing climate flipped 8-16°C in just decades 25 times during the last ice age. Abrupt shifts that redefined 'climate change' as potentially catastrophic.

A sudden explosion of fungal spores at the Permian-Triassic boundary. So much dead wood rotted at once that fungi briefly dominated Earth.

These 3.8-billion-year-old rocks contain isotopic signatures from before a Mars-sized planet slammed into early Earth and formed the Moon. The potassium-40 deficit here is a record of our planet before it was nearly destroyed and reformed, making these rocks older than the Moon.

3.8-billion-year-old rocks that might contain the oldest evidence of life on Earth. Faint chemical traces that could be ancient microbes; or just wishful thinking. Scientists are still fighting about it.

Carbon trapped in 3.7-billion-year-old rocks has isotope ratios suggesting biological origin. If true, life appeared almost immediately after Earth's crust cooled.

Certain rocks contain unusual amounts of tungsten-182, an isotope that should have been evenly mixed throughout Earth's mantle billions of years ago. Its uneven distribution proves that parts of our planet's interior never fully blended after the giant impact that formed the Moon.

Microscopic ecosystems in water-filled holes on glacier surfaces, created by dark sediment melting into ice. They contain bacteria, algae, and tardigrades living in temporary aquatic habitats that freeze and thaw seasonally.

Eight 500-year-old Inuit mummies frozen in Greenland ice. Clothes, tattoos, and even their last meals preserved, revealing how people thrived in the harshest climate on Earth.

A 518-million-year-old fossil site in the Arctic. Bizarre soft-bodied creatures preserved so perfectly they rival the famous Burgess Shale. But in one of Earth's most remote locations.

A 31 km wide impact crater discovered in 2018 under a kilometer of Greenland ice. If the asteroid struck 12,800 years ago, it may have triggered the Younger Dryas cold snap that sent temperatures plummeting and wiped out the Clovis people and North American megafauna. The timing is controversial.

Scientists spent 15 years trying and failing to sequence DNA from frozen Greenland dirt before the technology caught up. When it worked, they found the genetic ghost of a 2.4-million-year-old ecosystem with no modern equivalent, including mastodons no one knew had ever lived in Greenland. Hidden in the ancient DNA was a mutated blue-light receptor gene from a poplar tree, now being engineered into barley to see if crops can borrow survival tricks from a vanished world.

A high Arctic ecosystem where the growing season lasts just 60 days. Plants compress their entire life cycle into weeks, and research here tracks some of the fastest climate-driven changes in any ecosystem on Earth.

Black shales containing the chemical fingerprint of when North America and Europe finally split apart. The Atlantic Ocean's baby photo; 55 million years old.

These sharks live over 400 years, making them Earth's longest-lived vertebrates. One individual was born before Shakespeare wrote his plays. They achieve this by living in near-freezing water with a metabolism so slow they grow just 1 cm per year.