Comments on: Nano-Diamond Discovery Suggests a Comet Impact Killed the Mammoths

By: Robert Manley Lucas

Robert Manley Lucas — Tue, 22 Sep 2009 15:50:40 +0000

Ciff, The arrowhead sond as if it were made of a shard of a “thunderstone”, which would have crystals. If you have a picture of high resolution one might tell. I have a picture of some I have found in NC near the Carolina Bays (google them)

By: nitin singh

nitin singh — Wed, 09 Sep 2009 08:56:48 +0000

plz,send me some nano diamond’s reff. book in my email I.D.

By: cliff

cliff — Wed, 29 Apr 2009 14:30:59 +0000

I have an arrowhead which I found in the Yadkin River Valley of N. Carolina that appears to have iron fragments imbedded in it. Upon looking closer with a magnifying glass there are some very small sparkling objects there also. The artifact appears to be Hardaway which was a few thousand years after the Clovis. I am wondering if these “splarkling” things could possibly be nano-diamonds and the iron imbedded in the projectile point could possibly be from a meteorite? Would like to know where to find out.

By: YouRang

YouRang — Thu, 02 Apr 2009 16:44:51 +0000

I thought the definition of diamond was cubic crystal structure–that hexagonal structure was graphite.

By: Bruce C (Cincinnati)

Bruce C (Cincinnati) — Thu, 02 Apr 2009 15:20:51 +0000

The discovery of the hexagon shaped NANADIAMONDS in soil samples and core samples may be one of the most significant brekthroughs in terrestrial Metorite IMPACT science. Even if there is no evidence of a crater or any significant amounts of iridium, there could be several theories which could explain the event. A high altitude burst could cause fragments to scatter over a large area wher 13,000 years of erosion and weather may have hidden the evidence. An Atmospheric burst over the deep ocean would still send significant amounts of particles for 1,000 of miles and still very little impact evidence. Outstanding Discovery.

By: Bobo

Bobo — Thu, 02 Apr 2009 05:35:49 +0000

Amitava:

Currently nanodiamonds of terrestial origin are found in high percentage of cuboidal or rectangular lattice, pyrimidal cleavage etc.

Extraterrestial nanodiamonds have a high percentage of hexagonal crystal lattice.

The iridium signature and the nanodiamonds (hexagonal) found in these very discrete soil bands and ice bands of 12,500 year age are 2 key evidence points in the theory.

The fossil record drop off and the evidence of huge fires and sudden, massive climate cooling are others. Don’t really need a crater if Earth got ’sand-blasted’. I like the hit a glacier scenario too.

Life is hazardous to our health.

By: chris

chris — Wed, 01 Apr 2009 17:58:22 +0000

Its a really cool discovery. Somethign from 12,900 years ago.

By: chris

chris — Wed, 01 Apr 2009 17:57:00 +0000

awesome discovery

By: abby

abby — Wed, 01 Apr 2009 17:55:50 +0000

this is fasinating after i saw nova “last extinction” i got so interested in this, and he came up with the idea comparing it to when a comet hit Jupiter and shattered into pieces in Jupiter.

By: Amitava Banerjee

Amitava Banerjee — Mon, 09 Mar 2009 06:25:45 +0000

Is it possible to have nanodiamonds in the Earth through high P-T metamorphic processes ? Or it can only form through impact?

By: Gary Ansorge

Gary Ansorge — Thu, 26 Feb 2009 15:32:30 +0000

What was that Randy Newman song???Oh yes,” This world you love so much just might kill you,,,”.
Should perhaps be rephrased as “This Universe,,,etc.”

Comet/asteroidal impacts are a part of the chaotic aspect of reality. All any living being can do is roll with the punches. Those who roll the best,,,survive.

Excellent detective work.

Gary 7

By: Dennis Cox, Fresno, Ca.

Dennis Cox, Fresno, Ca. — Tue, 03 Feb 2009 15:45:39 +0000

It’s an interesting story. But when a layman discovers where it exploded no one want to hear it.
The epicenter of the main explosion was Lake Guntersville Ala. Check it out with Google Earth.

By: Jose

Jose — Fri, 30 Jan 2009 17:53:13 +0000

What does Pluto even have to do with this? Its completely irrelevant to say that on an article that doesn’t have anything to do with Pluto, find something regarding Pluto and complain there.

By: Ryan

Ryan — Sat, 17 Jan 2009 01:37:40 +0000

Not to be a smart alek or anything but technically they didnt say pluto wasn’t a planet but a dwarf planet. So it still is a planet but it just doesnt fall under the same catagory as some other planets:)

By: rosemary

rosemary — Sun, 11 Jan 2009 02:36:13 +0000

just to let you know i am not trying to be mean but i think you are stupid to say pluto is not a planet.