Using three megathere teeth and two teeth from relatively smaller ground sloths, they measured the abundance of certain isotopes within minerals inside the sloth teeth, Dr. Eagle explained.

Startup Colossal Biosciences has edited the DNA of a gray wolf to produce what it says is a de-extincted animal. Does that ...

Imagine standing in a place where time folds in on itself—a vast landscape of mountains, valleys, forests, and rivers. Now ...

They patrolled North America hunting giant ground sloths, bison, and other megafauna until about ... wider heads, larger jaws and teeth, and more muscular legs. Their precise relationship with living ...

If there were any contender for a real-life equivalent to the Oliphaunts of J.R.R. Tolkien’s Middle Earth, it would be ...

Giant ground sloth skeleton. Image by Wikipedia Loves Art participant ... Researchers have identified plant microfossils embedded in the tartar of the sloth’s teeth, providing direct evidence of its ...

Giant ground sloth skeleton. Image by Wikipedia Loves Art participant ... Researchers have identified plant microfossils embedded in the tartar of the sloth’s teeth, providing direct evidence of its ...

They patrolled North America hunting giant ground sloths, bison, and other megafauna ... larger jaws and teeth, and more muscular legs. Their precise relationship with living canids has been ...

A Texas-based biotech company has brought dire wolves—a species extinct for about 10,000 to 12,500 years—back to life in a landmark genetic engineering project. Colossal Biosciences, known for its ...