When searching for life in the Universe (aka. astrobiology), scientists use strategies that go by various names. For example, ...

Just because we can find ozone in the atmosphere of other planets doesn't mean there's life. Ozone is a sign of life on Earth ...

A new study reveals that the aerobic nitrogen cycle in the ocean may have occurred about 100 million years before oxygen began to significantly accumulate in the atmosphere, based on nitrogen isotope ...

Several key moments in Earth's history help us humans answer the question "How did we get here?" These moments also shed ...

May 22, 2025 — A modeling study shows that global warming will make it harder to reduce ground-level ozone, a respiratory irritant that is a key component of smog, by cutting greenhouse gas ...

PHOENIX (AZFamily) — A new study shows Phoenix ranks among the bottom five cities in the country for ozone pollution. The American Lung Association lists Phoenix as the fourth most polluted city ...

The Air Quality Index reflects the density of five pollutants in the air: ground-level ozone, particulates ... not on an auto cycle, so that air will be passing through the system’s filter ...

Definitions of hypoxaemia, hypoxia, type 1 respiratory failure and hyperoxaemia Definition of hypercapnia and type 2 respiratory failure Definition of acidosis (respiratory acidosis and metabolic ...

Why is the 1st batch of 17 female cadets passing out from NDA relevant to the UPSC exam? What is the significance of topics ...