Weird microbial partnership shows how complex life may have evolved
Stromatolites are rock-like structures formed by bacteria in shallow waterlkonya/Shutterstock Microbes from…
Our big brains may have evolved because of placental sex hormones
Exposure to hormones in utero could affect human brain growthPeter Dazeley/Getty Images…
Big animals have higher cancer risk – but also evolved better defences
African elephants have extra copies of genes that help resist cancerNeil Aldridge/Nature…
