Hair loss is an issue often associated with men but 40 percent of women says they experience it by age 40 so dermatologist Dr ...

Oxygen, in the amount current life seems to need, didn't emerge until relatively late in the planet's evolutionary history, only as early as around 3 billion years ago. But life emerged prior to ...

We suggest that as the Earth changed physically and chemically over time, its surface conditions allowed for a greater diversity of habitats for life. And these changes operate on geologic timescales ...

Precambrian time covers the vast bulk of the Earth's history, starting with the planet's creation about 4.5 billion years ago and ending with the emergence of complex, multicelled life-forms ...

Around one to two billion years ago, this mega-asteroid broke apart in the Asteroid Belt, producing a chunk of rock that us ape-like inhabitants on the Solar System’s third planet would one day ...

When the moon first formed 4.5 billion years ago—and was much closer to Earth—a day on Earth lasted about ... sun’s atmospheric tide. “It’s like pushing a child on a swing,” said ...

But go back a couple of billion years and things would ... ocean-dwelling life forms which appeared about 700 million years ago and disappeared around the time of the so-called Cambrian explosion ...

After all, evolutionary change isn't apparent in days, months, or years. Instead ... Since taking hold on Earth more than 3.8 billion years ago, life has never let go. Evolutionary transformations ...

All animal evolution for the last half billion ... years ago, providing fuel for movement and the evolution of more complex body structures. Others propose that an extinction of life just before ...