Dr Tony Heyes takes us through the big theories of science and how scientists have responded to philosophy. He shows how the more a scientific theory claims, the better the theory because it can potentially be disproved more easily. At the end of the day, nothing is absolutely certain. Science is tentative, provisional and only a metaphor of reality.

Retired satellite telecoms expert Graeme Hanigan's pet project is the preservation of the first ever commercial solar power station, built in 1980, at White Cliffs in western New South Wales. Graeme explains how it worked and why it should be recognised as an important part of Australia's engineering heritage.

Dr Tony Heyes takes us through the big theories of science and how scientists have responded to philosophy. He shows how the more a scientific theory claims, the better the theory because it can potentially be disproved more easily. At the end of the day, nothing is absolutely certain. Science is tentative, provisional and only a metaphor of reality.

Retired satellite telecoms expert Graeme Hanigan's pet project is the preservation of the first ever commercial solar power station, built in 1980, at White Cliffs in western New South Wales. Graeme explains how it worked and why it should be recognised as an important part of Australia's engineering heritage.

Physicist Dr Tony Heyes traces the development of science from the time of the Greeks, through the Dark Ages, the Renaissance and up to the 20th century. He describes the development of scientific method and the interaction between philosophers and scientists.

Physicist Dr Tony Heyes traces the development of science from the time of the Greeks, through the Dark Ages, the Renaissance and up to the 20th century. He describes the development of scientific method and the interaction between philosophers and scientists.

Physicist Dr Tony Heyes traces the development of science from the time of the Greeks, through the Dark Ages, the Renaissance and up to the 20th century. He describes the development of scientific method and the interaction between philosophers and scientists.

Physicist Dr Tony Heyes traces the development of science from the time of the Greeks, through the Dark Ages, the Renaissance and up to the 20th century. He describes the development of scientific method and the interaction between philosophers and scientists.

Our weekly news round-up: Total eclipse fever grips the US; NASA's massive video collection on archive.org; Largest volcanic region on Earth found beneath West Antarctica's ice; Big Australian survey to understand impact of smart phones on our lives, relationships and kids; Amazon takes on TicketMaster in Australia; Russians hack hotel guests via free wifi networks; Google Play Protect for Android; Microsoft laptops and tablets deemed unreliable by Consumer Reports; Scamwatch: supermarket customers subjected to continuing text message scams.

A wrap of key scientific findings in the rover's study of past habitability at Gale Crater.