14:0014:00, 2 April 2009diffhist−4
Zodiac
→In modern astronomy: astronomers would generally reject the claim that there's anything astrological about the system, never mind the historical fact; "tropical" is better as more specific anyway
22:0722:07, 25 March 2009diffhist−19
Rhenium diboride
"extremely expensive" is too vague to be verifiable, but note it's less expensive than gold. Many other metals are much more expensive than gold, so Rh isn't "extreme"
14:0014:00, 2 April 2009diffhist−4
Zodiac
→In modern astronomy: astronomers would generally reject the claim that there's anything astrological about the system, never mind the historical fact; "tropical" is better as more specific anyway
22:0722:07, 25 March 2009diffhist−19
Rhenium diboride
"extremely expensive" is too vague to be verifiable, but note it's less expensive than gold. Many other metals are much more expensive than gold, so Rh isn't "extreme"