If traveling into the past is possible, one way to do it might be sending people through tunnels in space.
by raggio5 via Pixabay
Scientists are trying to figure out if time travel is even theoretically possible. If it is, it looks like it would take a whole lot more knowledge and resources than humans have now to do it.
A young girl learning how to use a speech-generating device.
Increased acceptance of the use of alternative and augmentative communication technologies in general society can enhance the quality of life for people with speech impairment.
Hawking and the author.
Photograph: Thomas Hertog and Jonathan Wood
The enigma at the centre of our 20-year collaboration was how the Big Bang could have created conditions so perfectly hospitable to life
Stephen Hawking pictured in 2016.
In a new book, On The Origin of Time, Belgian physicist Thomas Hertog unravels Stephen Hawking’s last theory, which focuses upon one of the biggest questions of all.
Artist’s rendition of a concentration of small black holes in the centre of the galaxy NGC 6397.
ESA/Hubble, N. Bartmann.
Black holes can have a mass equivalent to that of millions of suns. Other, smaller, black holes can combine the mass of Mount Everest into the size of an atom.
Nothing is harder to find than you might think.
From more accurate climate modelling to the prospect of truly creative computers, the brain’s use of noise has a lot to teach us.
Our curiosity about time travel is thousands of years old.
Theories exploring the possibility of time travel rely on the existence of types of matter and energy that we do not understand yet.
Dr. Who used the this time machine, called the TARDIS, to travel through space and time on the BBC television show Dr. Who.
Babbel1996 / Wikimedia Commons
Who wouldn’t want to travel in time, glimpsing the dinosaurs or peeking at humans 2,000 years from now? Now physicists have designed a time machine that seems deceptively simple.
Lwp Kommunikáció/Flickr, CC BY-SA
Despite his playful optimism, Hawking recognised that the undiscovered laws of physics may prevent time travel.
We may not live in an infinite ‘multiverse’ of parallel universes after all.
Fact or fiction? Either way, an alien still seems menacing.
Cindy Zhi/The Conversation
Stephen Hawking raised the public profile of grand science, and speculated about the future of artificial intelligence, as well as contacting aliens. Does science mix easily with science fiction?
Hawking at the University of Cambridge.
Hawking wasn’t able to give his students a gentle introduction, but he did provide a lot of inspiration and support.
What goes in doesn’t go out?
The famous cosmologist was closely identified with black holes due to his revolutionary theoretical work explaining some of their mysterious properties.
Acclaimed British theoretical physicist, cosmologist and author Stephen Hawking passed away peacefully at his home in Cambridge aged 76.
Hawking’s life embodied what it means to have access to the human right of communication through communication technology.
Stephen Hawking both warned about and benefited from artificial intelligence.
Despite his fears artificial intelligence might one day overtake humanity, Stephen Hawking knew from his own life how profoundly AI could improve humans’ daily lives.
Stephen Hawking thought a form of string theory could be our best bet for a ‘theory of everything’.
Hawking had a cult-like following among academics and non-academics alike.
Stephen Hawking was a highly creative scientist, pushing past assumptions and playing with “what if” scenarios to take physics to new levels.
A computer-generated voice was essential to Hawking’s participation in the world around him.
AP Photo/John Raoux
You can probably hear Hawking’s famously computer-generated voice in your head. His example showed tech as a tool that enables people with disabilities to fully participate in and contribute to the world.
UK’s Astronomer Royal Martin Rees shares his memories of the physicist Stephen Hawking, who has died at the age of 76.