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ACROSS
1 Space station launched by the US in 1973 (6)
5 Soil or sediment, eroded and deposited (8)
9 Detection mechanism used in EPR spectroscopy (4, 4)
10 Iron sulphide, FeS2 (6)
11 Italian-born author of Atoms in the Family (5, 5)
12 Mineral aggregate; not paper or scissors (4)
13 渭+ (8)
16 Basalt-like 12 Across (6)
17 Flowering plant in the iris family (6)
19 Dugong or manatee (8)
21 The Seed Herbarium Image Project, or the Separator for Heavy Ion reaction Products? (4)
22 Term for an automobile feature also called a 鈥渢elltale鈥� (5, 5)
25 In physics, a fundamental, one-dimensional object (6)
26 H, He or N, for example, as opposed to Sn, Au or Hg (8)
27 鈥淭here is ___ in this view of life鈥� 鈥� Charles Darwin, 1859 (8)
28 Maxima or minima; boundaries (6)
DOWN
2 魏 (5)
3 Relating to Earth鈥檚 moon (5)
4 Avian infection such as H5N1 (4, 3)
5 Acetylsalicylic acid (7)
6 Pewit; green plover; Vanellus vanellus (7)
7 US astronomer (1928鈥�2016) whose work provided evidence for dark matter (4, 5)
8 Nettle rash (9)
14 Polaris (5, 4)
15 2010 sci-fi film starring Leonardo DiCaprio (9)
18 Beach material (7)
19 B. F. ___ (1904鈥�90), US behaviourist (7)
20 Vitamin A1 (7)
23 Section of the human small intestine (5)
24 Four-chambered organ (5)
Answers to Cryptic crossword No4
Across:
7 Social network
8 Workouts
9 Apex
10 Halogen
12 Ester
14 Enema
16 Examine
19 Asps
20 Pedantry
22 Magic mushroom.
Down:
1 Polo
2 Ginkgo
3 Albumen
4 Yeast
5 Sweats
6 Tree fern
11 Amnesiac
13 Oxidise
15 Mosaic
17 Manure
18 Spams
21 Root.
- Answers and the next cryptic crossword in the 27 April issue