There are those of us who see squirrels as cute and fascinating, but there is also a large contingent who regard them as “tree rats” - little pests that never tire of wreaking havoc in our attics, gardens, and just about anything else that catches their fleeting fancy. So who’s right? Nuts about Squirrels reveals the secret world of the ubiquitous urban grey squirrel with squirrel robots, micro-chipped acorns and an army of citizen scientists.

Are we alone in the universe? We may be very close to finding out. For millennia humans studying the stars had no idea if there were any other planets in the universe, let alone ones similar enough to ours to sustain life. Now, scientists may be close to discovering Earth-like planets, using a new space telescope and a technique pioneered by two Canadian astronomers.

Twelve hours of light. Twelve hours of dark. For our entire history we have lived and worked in rhythm with the sun. But all that changed with the invention of artificial light. Light fixtures, computer and television screens - all of these have allowed us more time to live, work, play and shorten our nights. But at what cost? Are we putting our health at risk? We explore how the type of light we are exposed to in the hours between dusk and bedtime can play tricks on our bodies and cancel the healthful benefits naturally triggered by the absence of light.

People struggle to combat a blood-sucking little insect that is both delicate and deadly.

There is a new hybrid species which is part wolf, part coyote.

The exotic world of fruit and the story of nature, commerce and obsession.

The conservation of the caribou and their environment is much-contested territory.

The national symbol has a new role as an ecological superhero.

Through pictures, music and poetry, Canadian Commander Chris Hadfield brings us a view of earth from space that we’ve never seen before.