Hacker News
new
|
past
|
comments
|
ask
|
show
|
jobs
|
submit
login
lisivka
on Nov 4, 2015
|
parent
|
context
|
favorite
| on:
Human-powered cranes
Pyramids are built of concrete - low tech technology (fire+water only) know for thousands of years.
Consider applying for YC's Spring batch! Applications are open till Feb 11.
Guidelines
|
FAQ
|
Lists
|
API
|
Security
|
Legal
|
Apply to YC
|
Contact
Search:
