In my house we all watch many times this channel. We like the way they take care of minute details while shooting,editing and presenting. As you said absolutely there are no negative effects on watching this channel.
All parents should advise their kids to watch this channel instead of Cartoon channels.
It interlinks with many of subjects like social, science, psychology, communication, biology, zoology, general knowledge and many other subjects.
This channel is suitable for everyone i.e different types of profile people.
It is very suitable for teenagers, children and matured people. It gives you a great knowledge about wildlife. It also gives idea about historical events and mystery.
It also provide a program of quiz and tricks etc.
And it also helps to know about manufacturing of different things.
It also helps to know and try to have a different recipes to cook.
In my view Discovery is a ocean of knowledge. The word Discovery itself describes about it.
"Life's Beauty is Inseparable from its Fragility ".
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease
I totally agree with you, discovery channel is the best platform from where kids can get information about science, earth, space etc.