The Swiss voice in the world since 1935
Top stories
Stay in touch with Switzerland

World’s largest particle accelerator restarts

Large Hadron Collider
The Large Hadron Collider, housed in a 27-km tunnel under the Swiss-French border, has been shut down for three years. It has been undergoing maintenance and upgrades, which were slowed down by Covid-19 © Keystone / Laurent Gillieron

CERN, the European Centre for Nuclear Research on the Swiss-French border, on Friday restarted the world’s largest particle accelerator in a bid to find out more about the origins of the universe.

The 27-kilometre Large Hadron ColliderExternal link has been out of action since the start of 2019 for maintenance and upgrades, which were slowed down by Covid-19. Restarting it is a complex procedure akin to directing “an orchestra”, where “all the right steps have to be taken at the right time”, CERN scientist Rende Steerenberg told Reuters earlier this week.

It will take six to eight weeks for the machine to run at full speed, and only then will proton collisions take place again, which scientists hope will reveal more about the fundamental laws of the universe.

Collisions observed at CERN between 2010 and 2013 brought proof of the existence of the long-sought Higgs Boson particle which, along with its linked energy field, is thought to be vital to the formation of the universe after the Big Bang 13.7 billion years ago. Physicists hope the resumption of collisions will help in their quest for so-called “dark matter” that lies beyond the visible universe.

More

The LHC is housed in a 27-kilometre tunnel beneath the French-Swiss border near Geneva and is the world’s largest and most complex scientific instrument. It smashes protons at almost the speed of light, recreating conditions a fraction of a second after the Big Bang 13.7 billion years ago.

Popular Stories

Most Discussed

News

Three inmates attempt to escape from Sion prison

More

Prison escape foiled by Swiss police

This content was published on Three inmates attempted to escape from Sion prison on Sunday morning. Their capture required a major police operation.

Read more: Prison escape foiled by Swiss police
The start of the holiday season means long traffic jams on the Gotthard

More

Gotthard traffic queue hits 11km at start of holiday season

This content was published on The start of the summer holidays saw a long traffic jam in front of the Gotthard tunnel on Saturday. Traffic jams between Erstfeld and Göschenen in canton Uri were up to 11 kilometres long early in the morning.

Read more: Gotthard traffic queue hits 11km at start of holiday season
Study: Rhine could become up to 4.2 degrees warmer by 2100

More

Rhine could warm by 4°C by 2100, scientists warn

This content was published on The water temperature of the Rhine River could rise by up to 4.2° degrees Celsius by the end of the century due to the warming planet, scientists warn.

Read more: Rhine could warm by 4°C by 2100, scientists warn
'Leopard 1 A5' combat tanks in Germany.

More

Switzerland eyes joining EU rearmament programme

This content was published on The Federal Council wants to explore the possibilities of joining the European Union’s €800-billion rearmament programme without compromising Swiss neutrality.

Read more: Switzerland eyes joining EU rearmament programme

In compliance with the JTI standards

More: SWI swissinfo.ch certified by the Journalism Trust Initiative

You can find an overview of ongoing debates with our journalists here . Please join us!

If you want to start a conversation about a topic raised in this article or want to report factual errors, email us at english@swissinfo.ch.

SWI swissinfo.ch - a branch of Swiss Broadcasting Corporation SRG SSR

SWI swissinfo.ch - a branch of Swiss Broadcasting Corporation SRG SSR