Ewan Mellor
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ewanmellor.org
Ewan Mellor
@ewanmellor.org
Research engineer at XBOW.
Yes, but more like hundreds of eyeglasses! Image is a chiton sample under a microscope, by Richard L. Howey, from www.microscopy-uk.org.uk/mag/artmay16...
January 3, 2026 at 6:16 AM
Not directly from rocks. The structures are formed biologically from Ca ions dissolved in the seawater (look up “biomineralization”). Presumably chalk and limestone are good sources for the calcium to get into the seawater in the first place, but I’m guessing at this point.
January 1, 2026 at 7:51 PM
@dombrasted.bsky.social The eye lens is aragonite, a calcium carbonate crystal. They grow it, like they grow their shells. msi.ucsb.edu/news/unravel...
Unraveling the Mystery of Chiton Visual Systems | UCSB Marine Science Institute
msi.ucsb.edu
January 1, 2026 at 5:51 PM
DM me if you’d like an employee discount on your first automated pentest!
December 3, 2025 at 11:37 PM
I sneakily took a candid photo of you working your tush off at Bay Area Science Festival this weekend.
October 27, 2025 at 4:54 PM
Walk round to Tunnel Tops Park. It’s not far from there and a much better view of the bridge.
October 16, 2025 at 5:09 PM
Reposted by Ewan Mellor
The trick to how it did it is in this post: xbow.com/blog/xbow-ti... Some details below...
XBOW – Another Byte Bites the Dust - How XBOW Turned a Blind SSRF into a File Reading Oracle
A complete arbitrary local file read vulnerability achieved through an ingenious byte-by-byte exfiltration technique.
xbow.com
July 28, 2025 at 10:10 PM
Absolutely epic trolling by Bluesky.
March 6, 2025 at 12:50 AM