I believe you can't ever get cleared. The only way to confirm mad cow is to dissect the brain, so obviously it can't be tested for in a living person. As a result, anyone with over a certain amount of risk for mad cow can never be allowed to donate.
I think the implication is that you age slower if you consume fewer calories. So if you adopt CR then you might feel at age 50 how someone on a normal diet feels at age 40, and at 100 you might feel as they do at 80.
I took a course that was all about the historical progression of science as a discipline since the early 1800's, and it really opened my mind to how much I didn't know about science. I really think that a course like that should be taught to students BEFORE they start taking high school science courses. This would provide a historical context for the content of science courses and, I believe, make it a lot easier to digest the material in a science class (for the reasons the author suggests).
Cows produce a huge amount of methane, from their digestive system. That alone is enough to cause significant environmental impact, and if we stopped eating beef we would see a decrease in the amount of methane released.
Both of these articles are fascinating - underdogs with clearly superior strategies dominate, and rather than learning from that, the powers that be just change the rules to prove themselves right. How shortsighted
True, but I bet that the NSA could force WhatsApp to issue certificates for fake keys. Obviously can't do that without being noticed, but they could still use it to spy on specific users if they wanted.
WhatsApp wouldn't keep the private keys. That being said, this system could still be hacked - when the clients exchange public keys, you insert yourself in the middle, provide your own public keys to each client, and mediate between the two clients, which gives you access to the unencrypted messages.
The thing is, WhatsApp is not just refusing to comply - they can't comply, since they don't retain message data. In addition, now that all messages are encrypted end to end, it will be impossible for them to comply in the future.