The U.S. Department of State lifted its "Level 4: Do Not Travel" mandate — and these countries are open to U.S. travelers.

The science may be dismal but it is flexible, too

The first of a series on areas where economists are rethinking the basics

Interest in Black British writing has grown and shrunk since the late 1940s. Is the current wave going to crash like those before it?

Plastics were not made for human consumption, and yet consume them we must. Tiny remnants of these synthetic polymers have now leached into our air, food and water, and avoiding them has turned into an almost impossible battle.

Three decades of research have led to a rethink

Researchers say their findings allow for a "better-informed judgment" of the birds.

Developers are creating waterfront homes in Boston with innovative seawall defences but is this a model for other cities? Or a sign of climate gentrification?

Nerve cells have a special ion channel that has a key role in starting the electrical impulse that signals pain and is sent to the brain. New research finds that people who inherited the Neanderthal variant of this ion channel experience more pain.

The discovery of hundreds of gold coins dating to the ninth century could help archaeologists better understand the history of the region.

Three decades of growing scientific certainty about climate change have yielded little progress.

The Greenland and Antarctic ice sheets, which hold enough frozen water to lift oceans 65 metres, are tracking the UN's worst-case scenarios for sea level rise, researchers said Monday, highlighting flaws in current climate change models.

Here’s what you need to know about reading daily pollution levels.

One of the most consumed drugs in the US – and the most commonly taken analgesic worldwide – could be doing a lot more than simply taking the edge off your headache, new evidence suggests.

The high temperatures and wildfires of 2019 were thought to have heralded a freak summer for the Arctic. Then 2020 brought worse.

A team of paleontologists has discovered what they believe is the world's oldest animal sperm, frozen inside a tiny crustacean in a blob of tree resin in Myanmar 100 million years ago.    

From bird feathers to fruit skins, the natural world has two main ways of displaying colour: through pigment substances that provide selective colour absorption, or through structural colour – the use of microscopic structures to control light re

Models have predicted for some time that with every degree of global warming, the Arctic will see double or more.

Just days after scientists said they discovered the presence of phosphine in the clouds of Venus, the head of Russia's space agency declared "Earth's evil twin" a "Russian planet."

As the US prepares to return humans to the Moon this decade, one of the biggest dangers future astronauts will face is space radiation that can cause lasting health effects, from cataracts to cancer and neurodegenerative diseases.​

When the brightness of the star Betelgeuse dropped dramatically a few months ago, some observers suspected an impending supernova - a stellar explosion that could also cause damage on Earth. While Betelgeuse has returned to normal, physicists have found evidence…