Issues from science today
What Makes You Sexy? Children become boys or girls at conception. But for alligators, the temperature during incubation decides the sex of their offspring. Why are they so different?
The newly-discovered human gene for sex is helping scientists answer this biological puzzle.
Testing, Testing ...
With huge stockpiles of nuclear weapons do the Superpowers - and Britain - need to continue testing them? Theodore Taylor , one of America's most inventive nuclear scientists, explores the secret world of the bomb-makers, from the Nevada desert to advanced weapons laboratories where the next generation of weapons is being invented.
Producers PETER CERESOLE
DANA PURVIS , JEREMY TAYLOR
Executive producer DAVID PATERSON Series producer JANA BENNETT