Scientists reexamined the fossil of a strange Cambrian sea creature and found that it is related to the 'weird wonder' Opabinia.
Seasons are periods of the year with distinct weather conditions and day lengths. Earth's four seasons are spring, summer, autumn (fall) and winter.
The Bernardinelli-Bernstein comet is officially the largest ever observed, according to new measurements.
The stunning images show scorching hot continents, plains and plateaus