![Elk Head of an Elk](/sites/default/files/styles/resource_card_image_360x300_/public/elk.jpg?itok=A5KYI62_)
Mammals: Herbivores
Picture Collections
15 images of some warm-blooded vertebrate animals such as cows, deer and giraffes that eat plant vegetation
![Fox Fox](/sites/default/files/styles/resource_card_image_360x300_/public/fox.jpg?itok=EHMUx6E-)
Mammals: Omnivores
Picture Collections
10 images of some warm-blooded vertebrate animals such as brown bears and chimpanzees that eat a diet of plants and animals
![dung beetle rolling dung](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Dung_beetle_rolling_dung.jpg?itok=1q-E0DEH)
How to Find a Mate When You Smell Like Dung
STEM Explained
Some dung beetles use alternative reproductive tactics to increase their chances of finding a mate. Learn what this tells us about evolution and biodiversity.
![Condensation on the window of the Apollo 12 Lunar Module, November 1969](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/Condensation_window_Apollo_12.jpg?itok=KtlUs1RV)
Humidity on Earth and on the ISS
Backgrounders
Humidity is an important part of life on Earth and life in space. This backgrounder explains what humidity is, how it is measured and how it affects us both mentally and physically.
![Monarch Butterfly Monarch Butterfly](/sites/default/files/styles/resource_card_image_360x300_/public/photo-1454047545088-4d599ca277de.jpg?itok=VbTeBLHD)
Insects: Part 3
Picture Collections
20 images of some animals such as ants and mosquitoes that have 6 legs and 3 main body parts consisting of a head, thorax and abdomen
![Ant, showing mandibles Ant, showing mandibles](/sites/default/files/styles/resource_card_image_360x300_/public/6594-1.jpg?itok=GQ0RA1wN)
Insects: Part 1
Picture Collections
10 images of some animals such as ants and mosquitoes that have 6 legs and 3 main body parts consisting of a head, thorax and abdomen.
![A forest damaged by pine beetles](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/pine-beetle-damage-forest.jpg?itok=rD_omerz)
How Do Introduced Species Affect Ecosystems and the Economy?
STEM Explained
When a species ends up outside of its natural zone, the consequences on other species, ecosystems and human industries can be severe. Climate change and human activities can introduce species into new zones.
![How does rain become acidic?](/sites/default/files/2019-08/how-does-rain-become-acidic.jpg)
How does rain become acidic?
Hands-on Activities
Learn how to make a pH indicator and test water samples.
![bees on frame held by beekeeper](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/Bees_at_work.jpg?itok=eCBFpn4d)
How are the World's Bee Populations Doing?
STEM Explained
Bees are important for agriculture. But bee populations face threats. This resource looks at Colony Collapse Disorder, herbicides & pesticides, and more.
![Salmon aquaculture pens](/sites/default/files/styles/resource_card_image_360x300_/public/2020-05/Salmon_aquaculture_pens.jpg?itok=yrwdnv2j)
Farmed Salmon vs. Wild Salmon
STEM Explained
Aquaculture is seen as a sustainable way to produce fish. But are farmed salmon better than wild fish?
![Goldfish Goldfish](/sites/default/files/styles/resource_card_image_360x300_/public/Gullfiskur.jpg?itok=L6czSzoc)
Fish: Freshwater
Picture Collections
4 images of some fish such as koi that live in freshwater river and lake environments and in freshwater aquariums and garden ponds
![Clown Fish Clown Fish](/sites/default/files/styles/resource_card_image_360x300_/public/Clown_fish_in_the_Andaman_Coral_Reef.jpg?itok=nkTzBh1T)
Fish: Saltwater
Picture Collections
14 images of some fish such as lion fish, grouper and sharks that live in saltwater environments like oceans, saltwater lakes and aquariums
![Water Lily Water Lily](/sites/default/files/styles/resource_card_image_360x300_/public/waterlily.jpg?itok=nnvmuAjZ)
Flowers: Cup Shape
Picture Collections
8 images of some flowerheads such as roses and water lilies whose outer petals are longer than the petals in the centre of the flower
![Iris Iris](/sites/default/files/styles/resource_card_image_360x300_/public/blueiris.jpg?itok=dvud8S14)
Flowers: Irregular Shape
Picture Collections
3 images of some asymmetrical flowerheads such as an iris and an Orchis Sima or Monkey Orchid
![Sunflower Sunflower](/sites/default/files/styles/resource_card_image_360x300_/public/sunflowers.jpg?itok=pmiRVO51)
Flowers: Radial Shape
Picture Collections
7 images of some symmetrical flowerheads such as asters and sunflowers whose petals radiate from the centre of the flower