The key to photodynamic therapy (PDT) is a compound known as a sensitizer, a light-sensitive medicine given to the patient, which when activated by light produces highly reactive oxygen-based species which kill the cancer cells.

In this era of upheaval in the ocean, driven by climate change and other stressors, technological innovations offer a flood of new data and new capabilities for translating it into actionable information.

Solar energy that reaches the Earth is about 125 million gigawatt (Gw).

The Svalbard Global Seed Vault in the Arctic, also known as the “doomsday vault,” has added its one millionth seed variety.

Seagulls favour food that has been handled by humans, new research shows.

Whether small-time farmers across the world get swept away by globalization or ride a wave of new opportunities depends largely on how much control they can get, according to a new study that takes a new, big-picture look.

Lead, arsenic, and other heavy metals are increasingly present in water systems around the world due to human activities, such as pesticide use and, more recently, the inadequate disposal of electronic waste. 

Intake of dairy milk is associated with a greater risk of breast cancer in women, according to a new study conducted by researchers at Loma Linda University Health.

Coral reefs are not doomed. Although human activities threaten the iconic ecosystems in many different ways, scientists maintain that reefs can continue to thrive with the right assistance.

Hot air rises, cold air sinks. It’s a basic tenet of nature.