No matter the size, every gift to the Museum is critical to our 300 scientists' work in understanding and protecting the natural world.

So it's very likely that there are a whole bunch of different stars that have contributed the elements we see in our own solar system, our planet and those found within you.

Dr Maggie talked about some big questions scientists are exploring answers to and shared amazing facts about the Universe. Dr Maggie Aderin-Pocock is a real-life space scientist (you may have seen her on the TV) with a passion for sharing the wonders of space and science.

Stars are immense objects - over 99% of the mass in our solar system is in our Sun - and gravity squeezes them. The other way to study the life cycle of stars is by finding samples of cosmic dust and observing them through an electron microscope. When that happens to really big stars you can get some really, really spectacular supernovas,' Ashley says.

Intrepid wildlife reporter Andy Seed is back with another collection of interviews for which he has risked personal safety, and gotten seriously wet, while talking to the giants of the oceans. On the periodic table, each element is distinguished by its atomic number, which describes the number of protons in the nuclei of its atoms. Climate change is creating deserts and dead zones, and hunting is driving many species to the brink of extinction.