Signs and symptoms of cancer depend on where the cancer is, how big it is, and how much it affects nearby organs or tissues. If a cancer has spread (metastasized), signs or symptoms may appear in ...

One Thai park ranger encountered a majestic black panther calmly strolling through Kaeng Krachan National Park in Thailand.

Many sharks, particularly those that live in the open oceans, are hunters rather than scavengers. Despite this, a small ...

For many people, "plastic pollution" calls to mind pictures of turtles and other marine life drowning in single-use plastic ...

The study analyzes the spatial distribution patterns of "grazing halos" surrounding coral reefs. Around the world, coral ...

Thirst, headache, and dry mouth are all signs it’s time to reach for water or a sports drink that’s low in sugar and high in electrolytes, says MedlinePlus. But the signs of dehydration aren ...