The underwater ice fascinates me. Maybe most of the melt has already happened.

That video is great. That's science for you -- no one has thought to slide CO2 blocks down a dune before, but now because of our exploration of Mars, we've discovered a new cool (literally) thing! I imagine someone *will* be CO2 surfing for YouTube hits before the summer is out.

Yay science!

They already know of a highly reliable way to detect a number of cancers by their olfactory traces - by using dogs trained for cancer detection.

So far there are dogs that are trained for skin and bladder cancer, and some others as well.

Attempts to build a machine with the same or greater accuracy & sensitivity as the canine nose still alludes scientists & engineers.

@3: Exactly! Why spend millions to make a mechanical dog nose?
This reminds me of the story about researchers studying how bean leaves kill bedbugs, and trying to make a synthetic material that does the same thing.
Just use the freaking bean leaves! Blargh.

@3,4: Good thing scientists have more curiosity and imagination than the two of you.

I am already in training for the Martian Dry Ice Boarding Olympics trials.

@4,

To be fair, spreading bean leaves around a house is pretty messy. If a company can come up with a liquid application of whatever's in the bean leaves that kills bedbugs, I'm sure a lot of people would opt for that.

@7 - It's not a chemical thing, but rather a micro-hook thing that pierces the exoskeletons of the bugs' feet and pins them in place. It would more likely be developed as a fabric, or a tape that can be laid out around a bed or something.