1.
2.
Making glass-to-metal seals for homemade vacuum tubes
(news.ycombinator.com)
3.
How a new extraction process could unlock the world’s lithium
(technologyreview.com)
4.
Snowball Earth may hide a far stranger climate cycle than anyone expected
(news.ycombinator.com)
5.
Efficiency-optimized relativistic plasma harmonics for extreme fields
(feeds.nature.com)
6.
Tech giant Oracle makes 'significant' job cuts
(feeds.bbci.co.uk)
7.
8.
12.
13.