A Chronicle of Timekeeping
Our conception of time depends on the way we measure it
Features
From Instantaneous to Eternal
The units of time range from the infinitesimally brief to the interminably long.The descriptions given here attempt to convey a sense of this vast chronological span.
A Hole at the Heart of Physics
Physicists can't seem to find the time--literally. Can philosophers help?
The Sciences
Real Time
The pace of living quickens continuously, yet a full understanding of things temporal still eludes us
Ultimate Clocks
Atomic clocks are shrinking to microchip size, heading for space--and approaching the limits of useful precision
Remembering When
Several brain structures contribute to "mind time," organizing chronologies of remembered events
Clocking Cultures
What is time? The answer varies from society to society
Space
How to Build a Time Machine
It wouldn't be easy, but it might be possible
Times of Our Lives
Whether they're counting minutes, months or years, biological clocks help to keep our brains and bodies running on schedule
Departments
That Mysterious Flow
- Letters
Letters
- Advances
Radio Space
After the Fall
Unsettled Air
Training for Terror
The Terminator's Back
Staying Open
Science to the Rescue
Dampened Swings
Glitch in the Machine
Net Size
Polio de Novo
- Recommended
Amateurs Take On the Universe
- Skeptic
Smart People Believe Weird Things
- Anti Gravity
Einstein's Hot Time
- 50, 100 & 150 Years Ago
Evolving Machines -- Dammed Nile -- Shaky Stocks
- Perspectives
The Chronic Complaint
- In Brief
Data Points: September 2002
Brief Bits: September 2002
- Puzzling Adventures
Venture Bets
- Voyages
A Promenade with Prosimians
- By the Numbers
Affording a Home
- Departments
Fuzzy Logic
- Ask the Experts
Ask the Experts: September 2002