It's been a debate for a long time whether or not the T-Rex had lips. Lips are actually quite useful for protecting your teeth, and especially if you have big teeth. But we don't have any good fossils that would tell us straight off what they looked like. So some researchers have been looking at schools of related species to try and find out more about them. The Komodo dragon does have lips - but they just cover their teeth.
00:44 The unusual receptors that let octopuses hunt by touch
Researchers have shown that the suckers of octopuses are covered with specialised receptors that allow them to taste by touching things. Similar receptors are also found in squid, but there are differences that mirror differences in the animals’ hunting behaviours; while octopuses feel for their prey, squid pull things towards themselves before deciding whether or not to eat it.
We discuss some highlights from the Nature Briefing. This time, what climate scientists can learn from medieval descriptions of lunar eclipses; how to retrieve rock samples from the surface of Mars; and the ongoing debate about whether T. rex had lips.