A newly found icy object, Ammonite, may be a 4-billion-year-old fossil from the Solar System’s edge—and it’s casting doubt on ...

A newly discovered dwarf planet called 'Ammonite' (2023 KQ14) has been spotted in the outer solar system, and it could be ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

Would one frozen world, just visible on the rim of the Sun’s kingdom, turn decades of speculation on the concealed layout of ...

Astronomers have found 2023 KQ14, nicknamed Ammonite, a rare sednoid with a unique orbit that challenges the Planet Nine hypothesis.

The fossil also contains other aquatic life—marine snails and relatives of today's pillbugs—as well as denizens of the coastal forest's leaf litter, including mites, flies, beetles, a spider ...

A fossil of a 150 million-year-old ammonite in southern Germany with its insides on the outside. Credit... Klug et al., Swiss Journal of Palaeontology, 2021. By Sabrina Imbler. Jan. 31, 2021.

Some extinct species left copious fossil remnants of their existence. Ammonites—an extinct type of cephalopod—are one such example. From the Devonian right up until the Paleocene, wherever ...