CATEGORIES

Guilt-Free Meat? - Should the world stop eating meat to tackle the climate crisis? Chris Baraniuk meets an experimental farmer who says we don't all have to become vegetarians

Should the world stop eating meat to tackle the climate crisis? Chris Baraniuk meets an experimental farmer who says we don't all have to become vegetarians. Livestock farming around the world is facing scrutiny because of its greenhouse gas emissions. Globally, the sector contributes somewhere between 11.1% and 19.6% of total emissions. Meat production is roughly twice as bad as the production of plant-based food, according to some analyses. And beef is the worst of all. Study after study has suggested that, in order to curtail the devastating effects of climate change, we ought to shift to a diet containing less meat - or even go vegetarian or vegan.

ZOMBIE STARS

+10 OTHER TERRIFYING SPACE OBJECTS

FUTURE TECH KANKOH-MARU

This ambitious reusable spacecraft will be capable of taking 50 people to and from orbit

THE FINAL FRONTIER

Beyond the reach of the Sun is a fascinating region of the cosmos that were only just beginning to explore

A long-lost moon could explain Mars' weird shape and extreme terrain

A long-lost moon could explain why Mars is so different from the other rocky planets in the Solar System. Today Mars has two tiny moons.

MARS LEAKS FASTER WHEN IT'S CLOSER TO THE SUN

The Red Planet has lost enough water to space to form a global ocean hundreds of kilometres deep

HOW TO BEAT LIGHT POLLUTION

Thought it was impossible to observe the wonders of the night sky from towns and cities? Think again. Follow our tips and tricks on successfully observing through sky glow

15 STUNNING STAR CLUSTERS

These beautiful stellar groupings are spattered across the cosmos

Eileen Collins "It was a difficult mission...we were the first to see Mir"

Having served as both the first female pilot and first female commander of NASA's Space Shuttle, Collins boosted the involvement of women in space exploration to a whole new level

MYSTERIES OF THE UNI WHERE ARE ALL THE SPIRAL GALAXIES?

There are far fewer spiral galaxies than elliptical ones in the Supergalactic Plane, and scientists are keen to discover why

A sprinkling of cosmic dust may have helped kick-start life on Earth

Cosmic dust may have helped kick-start life on Earth. New findings challenge a widely held assumption that this wasn't a plausible explanation.

THE PILLS TO END AGEING

No longer the stuff of science fiction, affordable treatments that could slow, stop or even reverse your ageing are, thanks to new breakthroughs, less than a decade away... You might even be taking some of them already

CHANGE THE (BODY) CLOCKS

Why the end of British Summer Time can be a wake-up call for our circadian health

Scientists want to build a giant 'bio-vault' on the Moon.Here's why...

Experts say the best place to preserve cells from Earth's most important species is not on this planet

LIVING FOSSILS

FOR SOME CREATURES ALIVE TODAY TIME HAS ALMOST STOOD STILL. MEET THE 'LIVING FOSSILS' THAT GIVE US A GLIMPSE INTO LIFE IN THE DISTANT PAST

ECLIPSES ON DEMAND

Inside an unassuming building, behind a damp car park in Antwerp, Belgium, scientists are teaching two spacecraft to be dance partners for a performance that will take place in front of the Sun.

THE MEXICAN MOLE LIZARD

Imagine what would happen if an earthworm, a lizard, a snake and a mole went on a night out, had too much too much tequila and let their guard down.

ARE OCTOPUSES SENTIENT?

If you've watched the Netflix documentary My Octopus Teacher or been lucky enough to encounter an octopus in the wild, you'll know there's something special about them.

THE UNEXPECTED RETURN OF PNEUMATIC TUBES

Once a pioneering technology that revolutionised deliveries, pneumatic tubes had all but disappeared. Now they're back and enjoying a resurgence

Do We Finally Know How the Egyptian Pyramids Were Built? - A number of breakthrough studies are beginning to paint a picture of how these wonders of the world were built, but much of the story still remains a mystery...

A number of breakthrough studies are beginning to paint a picture of how these wonders of the world were built, but much of the story still remains a mystery...How the Egyptian pyramids were built has long been a mystery. Constructed as tombs for the pharaohs over 4,000 years ago, more than 100 of them remain. The largest one, the Great Pyramid of Giza, was originally 147m tall (482ft). It's made up of about 2.3 million stone blocks, each weighing between 2.5 and 15 tonnes, and would have had to be transported to the building site and lifted into place with techniques available at the time. To put this into context, it's akin to lifting a double-decker London bus to the top of St Pauls Cathedral a few million times.

How Light's 'Secret Code' Reveals the Story of the Cosmos- The starlight we can see tells us a lot about the Universe, but it's the parts we can't see that contain the biggest revelations

When you see photos from a modern telescope of a planet, nebula or distant galaxy, it's easy to be dazzled by the detail. But what astronomers get really excited about is a property of the light our eyes can't see: the spectrum. This secret code embedded in starlight can tell us not only what a celestial object is made of, but also the story of our cosmic past.Back in the 18th century, scientists discovered that each substance produced its own pattern of colours when it was burning. It turns out that each element, when heated, emits light at certain colours specific to that substance.

An Artificial Heart Inspired by Plumbing - Mechanical circulation could revolutionise transplant design and reduce waiting lists

Mechanical circulation could revolutionise transplant design and reduce waiting lists. In July, this artificial heart was successfully implanted, for the first time, into a patient with end-stage heart failure. Built by The Texas Heart Institute (THI) and BiVACOR, the replacement organ has been dubbed the Total Artificial Heart (TAH). Although, being an implant rather than transplant, it's designed to temporarily support patients while they wait for a real heart transplant.

Major Stonehenge Discovery Deepens Mystery Around Ancient Monument - New findings suggest a key six-tonne stone came from over 450 miles north of the circle

Cue the conspiracy theories: new research reveals that one of Stonehenge's central and larger megaliths came neither from England, nor Wales, but from the far northeast of Scotland - and we don't know how it got there. Experts think the six-tonne altar stone must have been dragged or floated at least 750km (466 miles) south to complete the prehistoric monument.

JUPITER KING OF PLANETS

Blast off with BBC Sky At Night's Ezzy Pearson as she takes you on a voyage to explore the largest planet in our solar system.

A visitor from outer space

Scientists have spent years looking for alien life, but what if it found us first?

Space toilets

Doing your business in space is not as easy as you might think.

What are wormholes?

Find out if space has secret passages that give shortcuts through the universe.

Is gaming good for you?

Gaming is great fun, but some worry it could be bad for young people's health.

TITANS

The biggest dinosaurs grew to truly epic proportions. Peter Gallivan tells the super-sized tale of these giant reptiles and discovers why they grew so large.

Gladys West

Meet the hidden figure behind the navigation system in your smartphone.