Terence Dickinson (Mars Then and Now), is the editor of SkyNews, Canada's national astronomy magazine, and a regular astronomy commentator on The Discovery Channel Canada and CBC Radio.

As an accomplished astrophotographer, his photographs have appeared in publications as wide-ranging as Australian Geographic and Reader's Digest.

In 1994, the International Astronomical Union officially designated asteroid 5272 Dickinson in honor of his contributions to astronomy.

He is the recipient of more than 12 national and international science writing awards.

In 1995, in recognition of his achievements in popularizing science, he was appointed a Member of the Order of Canada.

In 2000 the U.S. Postal Service featured one of his photographs of the moon on a stamp.

This summer's opposition of Mars brings the planet closer to Earth than it has been in more than 50,000 years. Long-time Mars observer Terence Dickinson traces Mars exploration from the days of Percival Lowell through to the 21st century.