Sankrant Sanu सानु संक्रान्त ਸੰਕ੍ਰਾਂਤ ਸਾਨੁ

David Reich on how much ancient DNA evidence has overturned so much consensus thinking how ancient cultures spread. "It wasn't peaceful, it wasn't friendly, it wasn't nice. Some of our archaeologist co-authors were just really distressed."

Loads of footage of humanoids from the Beijing E-Town Half Marathon are doing the rounds, but this 1 really grabbed my attention. We can see the engineer pours what looks like a white, steaming substance from a large insulated flask into the backpack. These are Dry Ice Pellets. The backpack houses the main computation unit & the battery pack. High-speed running causes these electronics to generate massive heat. Because dry ice undergoes sublimation (turning directly from a solid to a gas), it absorbs a huge amount of heat very quickly w/o leaving any liquid (water) behind that could cause a short circuit. Another was crouched down spraying the knees & ankles. This is typically a PTFE (Teflon) based dry lubricant spray/a Cryogenic Coolant spray. Robot joints at this speed undergo 1000s of high-friction oscillations/min. Standard grease would fly off/get gummy. This spray ensures the joint stays slick while simultaneously cooling down the metal actuators so they do not expand & jam.

A brain expert just said what no one wants to hear about screen learning.🤯

🎬With Ishwar's grace, am posting Part-1 of my short Movie: 'Fibonacci Speaks'. May many children see it like Dhurandhar! to know How our Maths changed the World !

A non-vegetarian, Muslim-owned restaurant in Kerala has used an image of baby Krishna alongside meat in an advertisement for Vishu. The owners of the restaurant are Mohammed Hisham & Muhammed Uvaise. The central government appears so helpless that it could suspend Nupur Sharma despite no fault on her part, yet does not have the courage to take action against those responsible for this. Such a government seems ineffective when it comes to protecting the sentiments of Hindus. Please act & arrest these terrorists

Before it took off, the bird ate parts of its own liver, kidneys, and gut. That was the only way to be light enough to fly. Then it flew 8,425 miles from Alaska to Australia, in 11 days, without eating, drinking, or landing once. The bird is called B6. It's a bar-tailed godwit, four months old, weighing about as much as a can of beans. In October 2022, scientists at the US Geological Survey tracked its flight from Alaska all the way to Tasmania. The trip took 11 days and 1 hour. It is still the longest non-stop flight of any animal on Earth. For two weeks before takeoff, godwits eat until they almost double in weight. Fat ends up being 55% of their body, more than any bird ever measured. Then they shrink their own insides. About a quarter of their liver, kidneys, stomach, and intestines gets broken down and reused for fuel, making room for the extra fat and cutting weight. Their heart and wing muscles grow bigger at the same time. They never drink along the way. The water they need comes out of burning fat, the same reaction their muscles use for energy. They also never really sleep. B6 flapped its wings for 264 straight hours, cruising around 35 miles per hour with help from storm tailwinds. By the time it landed, it had lost almost half its body weight. The shrunken organs grew back over the following weeks. Scientists still cannot explain the navigation. B6 had never made this flight before. Adult godwits leave Alaska weeks earlier, so young birds fly alone with nobody to follow. How a four-month-old bird finds its way across 8,425 miles of open ocean to a place it has never seen is still an open question. About 100,000 bar-tailed godwits leave Alaska every fall. Most of them land in New Zealand or Australia 10 or 11 days later, having eaten parts of themselves to get there.