There are about 15,000 satellites orbiting the Earth. Most of them, like the International Space Station and the Hubble ...

When we think of blood, the colour red usually comes to mind. But in the animal kingdom, some creatures have blood that ...

Stefan Lovgren writes on how freshwater fish from the Arctic to Africa are endanged by climate change and the unpredictable ...

When lungs fail to maintain vital oxygen and carbon dioxide levels, respiratory failure occurs, posing a serious threat. This ...

“Dedicated efforts and investments by EPA, Connecticut, New York and local governments have drastically reduced the amount of ...

There are about 15,000 satellites orbiting the Earth. Most of them, like the International Space Station and the Hubble ...

You are taught early in science that oxygen on Earth comes from sunlight. Plants, algae, and cyanobacteria use light to split water and release oxygen, shaping the atmosphere and making complex life ...

Smartwatches and fitness trackers don't actually measure VO2max; they just estimate it. To actually find your VO2max, you'd need to go to an exercise lab and do a test on a treadmill or cycle while ...

Low blood pressure may cause no symptoms, but the presence of symptoms necessitates medical attention. Possible symptoms can include dizziness, fainting, fatigue, confusion, nausea, blurry vision, ...

For roughly 2 billion years of Earth's early history, the atmosphere contained no oxygen, the essential ingredient required for complex life. Oxygen began building up during the period known as the ...

Researchers in the U.S. have found that exposure to low oxygen levels — known as hypoxia — early in life can cause pulmonary hypertension (PH) by permanently altering lung blood vessel development.