How heavy is heavy water and what does it taste like? Find out in ScienceSeeker's picks of the best posts for the week of March 25 - March 31, 2019 #SciSeekPicks #SciComm.

In this weeks' picks, ponder the existence of free will and find out how hallucinating mice can help us to better understand our brains. Find these and many other important topics covered in the ScienceSeeker editors' round up of their favourite posts of the week within their respective areas of interest and expertise:

Sabine Hossenfelder's video on her take on superfluid dark matter.
Well worth a watch. Credit: Sabine Hossenfelder via Youtube.

• Superfluid dark matter [Video] by Sabine Hossenfelder at Backreaction.
• Is this why time speeds up as we age? by Robby Berman for BigThink.
• Where is the mass inside a black hole? by Francisco R. Villatoro for Mapping Ignorance.
• No, quantum tunneling didn’t break the speed of light; Nothing does by Ethan Siegel at Starts With A Bang.

Watch Michelle Francl's video on the weight and taste of heavy water!

Credit: Michelle Francl via Youtube.

• The weight of water [Video] by Michelle Francl at The Culture of Chemistry.
• Tsunami preparedness week 2019 by Michael Coston at Avian Flu Diary.
• Meet Scotty, world’s largest specimen of Tyrannosaurus Rex by Sci-News.com.
• A Pleistocene GPS tracker by Cosmos Magazine.
• Hallucinating mice bring us one step closer to what’s going on in the brain by Jennifer Ouelette for Ars Technica.
• Does free will exist or is it an illusion? by NeuroPsych at On Psychology and Neuroscience.
• Weekend Links: Rats can't puke, why cats always land on their feet, people who can actually smell parkinson's and more by the Mass General Research Institute.

Check back next week for more great picks!