Science story
Time travel is possible, but only if there are parallel timelines in the universe
In science fiction works, as long as we have a time machine, we can go back to the past at any time.
Past
Browse ScienceInfo articles and explainers related to Past.
Topic archive
Articles about Past
891 published items.
Environment
How do humans change the world's rivers?
Over the past 40 years, humans have altered the world's largest rivers at an unprecedented rate.
Environment
The dreamlike natural wonders of the world have disappeared forever in just the past 10 years
A series of wonders, famous tourist attractions have been permanently unable to return because of human impact.
History
Evidence of advanced civilizations living on Earth more than 100,000 years ago?
History is always interesting to curious people, for all that we have known, are knowing and will know are only incomplete pieces of the whole picture of the past of hum…
Space science
New evidence of Earth's ability to 'reverse'
Earth's protective crust has undergone an unusual change over the past two centuries, which may affect the planet's magnetic polarity reversal.
Photo library
The first multi-subject photos taken in history, the more you look at it, the more you admire the development of humanity
Although photography has become a habit of many people now, it was a revolutionary invention in the past.
Scientific works
Visit the world's first nuclear crypt, where 6,500 tons of radioactive waste will rest for 100,000 years
The foundation beneath Onkalo has been stable for at least the past 1 billion years. Geologists say the area won't experience any more earthquakes until the next ice age.
Space science
NASA claims: Mysterious door on Mars is 'entrance to ancient past'
The first Mars citizen operating group, Curiosity, has just made the first official statement about a structure resembling a mysterious man-made door on the red planet.
Science story
Prodigy with higher IQ than Albert Einstein: Math genius, was expelled from school in the past because he was too smart
Surely many people will have to 'sweat' when learning about the life of Dao Triet Hien - a Chinese math prodigy.
1001 mystery
A strange story about an Indian girl who remembers her past life
When she was just four years old, little Shanti Devi started telling her parents amazing details about her 'past life' life in a strange town, more than 100km away.
Discover science
What is always kept by the Mongol cavalry in their cloaks and carried away to 'fight the east and clear the north'?
Many factors had contributed to the extremely successful military campaigns of the Mongols in the past, but there was one that their cavalry could hardly ignore before b…
Space science
Humans need matter with negative energy to build a time machine
Humans need matter with negative energy to build time machines. The good news is that quantum theory confirms the existence of that form of matter.
Space science
Water from Earth's atmosphere may have caused rain on the Moon
Over the past billions of years, Earth may have dumped about 3,500 cubic kilometers of water onto the Moon's poles.
Science story
Physicists are proving time does not exist, what are the consequences of that?
Can we punish a criminal, for what he did in the past, when the world really has no past or future?
History
Surprised with ancient snacks, the list makes posterity crave
Have you ever wondered, in the absence of processing machines and tools like in the past, what can ancient people make to serve the needs of snacks?