What does “95 percent effective” mean? Should you get vaccinated if you have had COVID? Is there a best vaccine?

In the 1800s, they helped lay the groundwork for the anti-vaccine movement.

Fall semester was the start of a big experiment

Centuries before coronavirus, plague, smallpox, yellow fever and other contagions killed hundreds of millions around the world

A kangaroo painting is now Australia’s oldest known rock art.

A new proof demonstrates the power of arithmetic dynamics, an emerging discipline that combines insights from number theory and dynamical systems.

From the famous artist M.C. Escher to Magic Eye posters, here are some of the most famous optical illusions.

Although archaeologists have been eyeing the representations of local waterfowl since the fresco's discovery at the dig site of Meidum in 1871, it's taken an evolutionary biologist's clever taxonomic sleuthing to see the birds for what they really were.

Scientists are concerned by falling sperm counts and declining egg quality. Endocrine-disrupting chemicals may be the problem.

Nearly all scientists believe that Oumuamua is an asteroid or comet-like object that has traveled through interstellar space.  But Avi Loeb, a Harvard professor of astronomy, suggested it is indeed an alien spaceship.

When NASA says that the Perseverance rover will be looking for fossil evidence of ancient life they are not looking for actual animal skeletons.

To boldly farm fish where no one has farmed fish before.

When the Huygens probe descended from the Cassini spacecraft in 2005 and gave humans a close-up of Titan’s dense atmosphere, scientists began dreaming of a future mission that would further explore Saturn’s largest moon.

New information challenges ideas about the evolution of massive stars.

The rodents are often considered ‘nuisance animals’, but they can play a vital role in maintaining healthy landscapes.

This device is the Photovoltaic Radio-frequency Antenna Module (PRAM).

Scientists are working on a ‘universal’ coronavirus vaccine.

Apple has acquired about 100 companies over the last six years, the company’s chief executive Tim Cook has revealed.

Extreme weather driven by climate change is making power outages more commonplace even as the need for electricity-dependent home health equipment grows.

Research has specifically linked arugula and other cruciferous vegetables with the health benefits listed here.

Here are tips from sleep and anxiety experts on how to shut down that whirling dervish of a brain and coax your body back into much-needed sleep.

Food researchers debate whether highly processed foods like potato chips and ice cream are addictive, triggering our brains to overeat.

Regulators are considering whether disinfectant ingredients called quats are safe and effective in light of increased use during the COVID-19 pandemic.

Distressing ringing noises in the ears are often treated with cortisone. Now, a German researcher is remedying the problem by stimulating people's tongues.

The display was described by one expert as “one of the most striking in the last few decades”.

New study suggests that over-hunting (the standard explanation) wasn't the reason they disappeared.

Radiocarbon levels in several pieces of wood chart a surge in radiation from space, as Earth’s protective magnetic field weakened and its poles flipped

Permafrost-preserved teeth, up to 1.6 million years old, identify a new kind of mammoth in Siberia.

These ancient guardians of the traditional nomadic way of life are making a comeback.

As oil companies go out of business, they are leaving a legacy of abandoned wells that leak huge amounts of greenhouse gases into the atmosphere

An overlooked but powerful driver of cloud formation could accelerate the loss of polar sea ice.

A new UN blueprint offers an integrated 'peace plan' to tackle three interlinked environmental emergencies — the climate crisis, biodiversity loss and pollution — that cannot be solved in isolation.

Billionaires have carbon footprints that can be thousands of times higher than those of average Americans.

Sea level rise and heavier rainstorms driven by global warming are sending more water into residential neighborhoods from the Gulf Coast to New England to Appalachia to the Pacific Northwest.

In recent years, tipping points – thresholds where a small change could push a system into a completely new state – have increasingly become a focus for the climate research community.

Many big businesses have not set targets for reducing greenhouse gas emissions. Others have weak goals.

'Put a Big Fat Price on Carbon': OECD Chief Bows Out With Climate Rally Cry

The outgoing head of the Organization for Economic Co-operation and Development (OECD) says action on environmental crises must be defining focus of wealthy countries after Covid

Roughly 4.3 million homes - concentrated in Florida, California, South Carolina and Texas - have a substantial risk of sustaining economic damage from flooding this year, the report shows.

India is experiencing dramatic climate impacts, with both increased flooding and drought.