Study says surge in volcanic activity could not have caused Cretaceous/Paleogene extinction eventA 66m-year-old murder mystery has finally been solved, researchers say, revealing an enormous asteroid struck the killer blow for the dinosaurs.The Cretaceous/Paleogene extinction event resulted in about 75% of plants and animals – including non-avian dinosaurs – being wiped out. But the driving...

Around the world men and women are responding differently to Covid-19 yet few countries are taking note of these differences. This isn’t unique to this pandemic but typical of how female biology has been largely ignored when it comes to medical research. Gabrielle Jackson examines the resulting knowledge gap and the repercussions for how women and gender diverse people are treated in our medical...

The shattering solutions to today’s puzzlesEarlier today I set the following three puzzles:1. With two straight line cuts, divide the vase into three pieces that can be reassembled to form a square. Continue...

Your questions answered on what type of mask to wear to cut the risk of getting Covid-19Coronavirus – latest updatesSee all our coronavirus coverageYes. Different types of mask offer different levels of protection. Surgical grade N95 respirators offer the highest level of protection against Covid-19 infection, followed by surgical grade masks. However, these masks are costly, in limited supply,...

Smashed it!My puzzle book So You Think You’ve Got Problems is out in paperback this week. Here are three problems from it. The first is about a vase, the second is about a leg, and third is about a set of keys.1. With two straight line cuts, divide the vase into three pieces that can be reassembled to form a square. Continue...