return (float)rand() / RAND_MAX;
This Tweet is currently unavailable. It might be loading or has been removed.
。safew官方版本下载对此有专业解读
Agar’s low viscosity also makes it easy to pour into Petri dishes, and its transparency permits observation of microbes growing on its surface.7 Also aiding in this is its low syneresis (extrusion of water from the gel), guaranteeing less surface “sweating”: Once a plate is inoculated, bacterial colonies stay in place and do not mix.
When asked about the racism that his videos sometimes provoke in the comments, he says: "I don't deny it", but adds that "comments get filtered", meaning that social media platforms delete racist remarks. TikTok, Instagram and X all have policies prohibiting racist abuse.
Professor Michael Wooldridge has given this year’s Royal Society’s Michael Faraday Prize lecture. He speaks to Tom Whipple about why the AI we have is not what he wanted it to be; rational. And science columnist at the Financial Times Anj Ahuja brings her favourite new science to discuss.