Why Do We See Lightning Before We Hear Thunder?
Lightning and thunder are two faces of the same discharge. The channel heats violently; air expands and makes a shock wave. Light leaves almost at onc...
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News
Stay updated with the latest news and analysis on RoAdevar.
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US Weighs Preserving Most Pharmaceutical Licensing Deals with Chinese Firms
The US Treasury Department is drafting rules on China-related pharmaceutical investment that would, in the main, leave licensing deals for Chinese med...
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98 years since the first English Channel crossing by a rotorcraft
18 September 2026 marks 98 years since the first English Channel crossing by a rotorcraft. The Vertical Flight Society dates the flight to Tuesday 18...
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Major TV Makers Expand Voluntary Agreement to Reduce Energy Use
The Consumer Technology Association said on 16 September that major television manufacturers, operating-system vendors and energy-efficiency groups ha...
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South Korea Rules Out Military Involvement in the Middle East Conflict
South Korean President Lee Jae Myung said on Friday, at a Cheong Wa Dae news conference, that Seoul would not send troops or military assets in a form...
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How Do Birds Find Their Way During Migration?
Migrating birds do not carry a single “GPS”. The Cornell Lab of Ornithology and USGS describe a set of cues that complete one another: Sun, stars, mag...
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Italy Calls for More Ships to Protect Commercial Traffic in the Red Sea
Italian Defence Minister Guido Crosetto called on Friday for a stronger naval presence in the Red Sea to escort merchant ships as tensions rise around...
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California Requires Labels on Ads Featuring AI-Generated Performers
California Governor Gavin Newsom signed SB 1050 on 16 September, requiring a clear, conspicuous disclosure when an audio, video or audiovisual adverti...
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153 years since the collapse of Jay Cooke & Company triggered the Panic of 1873
18 September 2026 marks 153 years since Jay Cooke & Company suspended payments. Federal Reserve History ties the news to 18 September 1873 and to fina...
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Why Do Bridges Have Expansion Joints?
The short noise at the end of a bridge is often an expansion joint. It looks like a break in the asphalt, but it is a structural part. Steel and concr...
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EPA Eliminates Federal Greenhouse Gas Limits for Power Plants
The US Environmental Protection Agency has announced the repeal of federal rules that limited greenhouse-gas emissions from coal- and gas-fired power...
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China Rare Earth Group in Talks to Acquire Shenghe Resources, Sources Say
State-controlled China Rare Earth Group is in advanced talks to acquire Shenghe Resources, according to sources cited by Reuters. Neither the companie...
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