A new approach is needed to solve this set of problems.

A meteor shower appeared in the night sky.

Suddenly, a rainfall that starts and stops abruptly began and then stopped immediately.

We offer a wide range of product lines to meet our customers' needs.

He is suffering from Raynaud's syndrome.

We analyzed the data of the experimental group.

He is studying the major ethnic groups in that region.

This species has different characteristics depending on its subgroup.

In biology, neoteny refers to the phenomenon where the adult retains the form of the juvenile.

Paleoecology is a field of study that investigates the relationship between past organisms and their environment.