This daily feast-and-famine cycle in oxygen availability created an intense physiological challenge for early animals, ...

We may be starting to get a grasp on what kick-started life on Earth – and it could help us search for it on other planets ...

By exposing organic molecules to repeated wet-dry cycles, researchers observed ... the molecular complexity needed for life to emerge. To simulate early Earth, the team subjected chemical mixtures ...

What water, chemistry and temperature cycles fostered the chemical reactions that allowed life to emerge on our planet? Because life arose in the largely unknown surface conditions of Earth’s early ...

To complete the arctic fox's life cycle. Life cycles are as varied and diverse as life on Earth. Whether it's a mammal, like the arctic fox, or a bird, or a plant or an insect, different groups of ...

The chemical element sulfur is essential for all lifeforms and is a building block of proteins and amino acids. By studying ...

A team of researchers say their latest attempts to understand how molecules chemically reacted to form the basic building blocks of life on Earth are promising. There has long been debate about the ...