JoNova

A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).


Handbooks

The Skeptics Handbook

Think it has been debunked? See here.

The Skeptics Handbook II

Climate Money Paper


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GoldNerds

The nerds have the numbers on precious metals investments on the ASX



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Books

Weekend Unthreaded

Weekend Unthreaded

Weekend Unthreaded

Weekend Unthreaded

Weekend Unthreaded

Weekend Unthreaded

Saw this extraordinary rock in the sky five minutes ago. Had to take a photo sitting on the lawn in the dark of something, apparently, 400,000 kilometers away. I do like the way the sun illuminates the weathered texture on the edge of the light.

Last week Jaxa announced they found a lava tube cave 50m wide and 50km long, with handy walls that may contain water in rock form. (Chilled, ready for cocktails). It might be a neat home for astronauts since on the surface, the daytime temperature range is 260 degrees C, the nights last two weeks, and the air contains levitating electrostatic abrasive dust. It’s poisonous too “like asbestos”. I can’t see the Sea of Tranquility taking tourists from Barbados.

The maxi cave is in Marius Hills, which as best as I can tell is on the dark part on the right hand side. Though it’s hard to tell. For some reason, people keep posting photos of this rock upside down.

Here’s a challenge,  in the daytime, the UV index is off the charts (if it gets to 14 in Darwin, what does it get to on the lunar surface? I can’t find the forecast, [...]

Weekend Unthreaded

Rainbow over Castle Rock, Oct 2017.

We had a few days away last week in Geographe Bay, SW WA thanks to the kindness of a supporter. Miles of quiet beaches for those who don’t like crowds.

Weekend Unthreaded

Weekend Unthreaded

Weekend Unthreaded